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Journal articles on the topic 'Thickness dependences'

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Author: Grafiati

Published: 10 December 2022

Last updated: 28 January 2023

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1

Янилкин, И. В., А. И. Гумаров, А. М. Рогов, Р. В. Юсупов, and Л. Р. Тагиров. "Синтез тонких пленок ниобия на кремнии и исследование их сверхпроводящих свойств в области размерного кроссовера." Журнал технической физики 91, no. 2 (2021): 275. http://dx.doi.org/10.21883/jtf.2021.02.50362.170-20.

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Niobium films of 4–100 nm thickness were synthesized on a silicon substrate under ultrahigh vacuum conditions. Measurements of electrical resistance showed a high temperature of the superconducting transition Tc, in the range of 4.7–9.1 K, and extremely small transition widths ΔTc in the range of 260–11 mK. The dependences of Tc and ΔTc on the magnetic field were studied, and superconducting coherence lengths and mean free paths of the conduction electrons were determined for different thicknesses of the synthesized films. A specific effect of the magnetic field on ΔTc was found, which reveals a transition from three-dimensional to two-dimensional superconductivity at thicknesses below 10 nm. The dependences of Tc and ΔTc on the films thickness and the magnitude of the magnetic field are discussed in the framework of existing concepts of superconductivity in thin films of superconducting metals.

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2

Rinkevich, Anatoly B., Dmitry V. Perov, and Yuriy I. Ryabkov. "Transmission, Reflection and Dissipation of Microwaves in Magnetic Composites with Nanocrystalline Finemet-Type Flakes." Materials 14, no. 13 (June 23, 2021): 3499. http://dx.doi.org/10.3390/ma14133499.

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The microwave properties of a composite material containing flakes of finemet-type nanocrystalline alloy placed in the epoxy matrix have been investigated. Two compositions have been studied: with 15% and 30% flakes. Frequency dependences of transmission and reflection coefficients are measured in the frequency range from 12 to 38 GHz. The dielectric permittivity and magnetic permeability are obtained, and the microwave losses are calculated. The dependences of transmission and reflection coefficients have been drawn as functions of wave frequency and thickness of the composite material, taking into account the frequency dependences of permittivity and permeability. The regions of maximal and minimal microwave absorption have been defined. The influence of wave interference on the frequency dependence of microwave absorption is studied.

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3

Агекян, В. Ф., А. Ю. Серов, Н. Г. Философов, and G. Karczewski. "Экситонная люминесценция двойных монослоев CdTe в матрице ZnTe." Физика твердого тела 63, no. 5 (2021): 674. http://dx.doi.org/10.21883/ftt.2021.05.50820.273.

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A series of ZnTe matrix containing two CdTe monolayers separated by barrier layers of different thicknesses is studied. The dependences of the energies of the exciton emission bands related to the CdTe monolayers, their relative intensities, and temperature behavior on the thickness of the ZnTe barrier layer are determined. It is established that CdTe monolayers can be considered independent of each other with a barrier layer thickness of more than 30 monolayers.

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4

Yeshchenko, O. A., V. V. Kozachenko, and A. V. Tomchuk. "Surface Plasmon Resonance in “Monolayer of Ni Nanoparticles/Dielectric Spacer/Au (Ni) Film” Nanostructure." Ukrainian Journal of Physics 63, no. 5 (July 3, 2018): 386. http://dx.doi.org/10.15407/ujpe63.5.386.

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The dual surface plasmon resonance in Ni nanoparticles in “monolayer of Ni nanoparticles/shellac film/Au (Ni) film” planar nanostructures has been observed in UV-vis absorption spectra. The dependences of the intensity, wavelength, and width of the dual SPR absorption peaks of Ni nanoparticles coupled with an Au (Ni) film on the spacer thickness have been studied in the range of spacer thicknesses of 12–43 nm. The main features of these dependences are an increase of the intensity, the blue shift, and the monotonic behavior of the widths of SPR absorption peaks at a decrease of the spacer thickness. The observed dependences have been rationalized as a result of the plasmonic coupling of the monolayer of Ni nanoparticles withthe metal film and the variation of the dielectric permittivity of the environment of Ni nanoparticles caused by the metal film presence. The stronger dependences of the SPR spectral characteristics of Ni nanoparticles have been observed in the nanostructure containing the gold film comparing to that with a nickel one. Such effect is due to the stronger coupling of Ni nanoparticles with an Au film, and the stronger influence of an Au film on the permittivity of the environment of Ni nanoparticles.

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5

He, Yan, Yuan Zheng Tang, Man Ding, and Lian Xiang Ma. "Thermal Conductivity of Amorphous and Crystalline SiO₂ Nano-Films from Molecular Dynamics Simulations." Key Engineering Materials 501 (January 2012): 64–69. http://dx.doi.org/10.4028/www.scientific.net/kem.501.64.

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Normal thermal conductivity of amorphous and crystalline SiO2nano-films is calculated by nonequilibrium molecular dynamics (NEMD) simulations in the temperature range from 100 to 700K and thicknesses from 2 to 6nm. The calculated temperature and thickness dependences of thermal conductivity are in good agreement with previous literatures. In the same thickness, higher thermal conductivity is obtained for crystalline SiO2nano-films. And more importantly, for amorphous SiO2nano-films, thickness can be any direction of x, y, z-axis without effect on the normal thermal conductivity, for crystalline SiO2nano-films, the different thickness directions obtain different thermal conductivity results. The different results of amorphous and crystalline SiO2nano-films simply show that film thickness and grain morphology will cause different effects on thermal conductivity.

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6

Prudnikov, Vladimir V., Pavel V. Prudnikov, Egor V. Drovorub, and Nikita S. Simakov. "Simulation of magnetic properties of spin valve nanostructures." Herald of Omsk University 25, no. 4 (December 28, 2020): 36–45. http://dx.doi.org/10.24147/1812-3996.2020.25(4).36-45.

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The Monte Carlo study of spin-valve magnetic structures with giant magnetoresistance effects has been performed with the application of the Heisenberg anisotropic model to the description of the magnetic properties of ultrathin ferromagnetic films. The dependences of the magnetic characteristics on the temperature and external magnetic field have been obtained. Dependence of hysteresis phenomena on thickness of ferromagnetic films and various values of intralayer and interlayer exchange interaction is studied.

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7

Yakimovich, Nikolay V., Sergey N. Bukharov, Victor V. Kozhushko, Anastasiya S. Khmara, and Vladimir P. Sergienko. "Sound-Absorbing Composites Based on Flax and Polymer Fibers." Applied Mechanics and Materials 806 (November 2015): 161–66. http://dx.doi.org/10.4028/www.scientific.net/amm.806.161.

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The paper considers sound absorption of the composite materials, which are based on the natural flax and polymer fibers. The thickness of a single layer of obtained nonwoven composite is about 10 mm. The analysis of absorption dependences is carried out for different thicknesses of the material. It is shown that in the low frequency range the absorption almost linearly increases depending on the thickness. The coefficient of the normal absorption increases with the frequency in the range from 50 Hz up to 1600 Hz. The hot-pressed material can be used for panel production. The sound absorption increases with the thickness of the pressed material. The measurements show the possibilities of application of the composite for the production of the parts of cabs’ interior.

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8

Voronin, Nikolay A. "Abnormal Structural Strength of Topocomposites." Advanced Materials Research 560-561 (August 2012): 338–43. http://dx.doi.org/10.4028/www.scientific.net/amr.560-561.338.

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The mechanics of contact interaction of rigid spherical indenter with two-layer elastic - plastic half-space, simulating a surface of a solid body with a thin surface layer is considered. Analytical dependences of critical indentation and bearing capacity on mechanical characteristics of materials of a base and a coating, and as well as that for thickness of top layer (coating) in all region of possible thickness are received and analyzed. Existence of regions of the abnormal structural strength allowing the surface layered material to identify unequivocally as a topocomposite is shown. Theoretical dependences were verified by a final elements method.

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9

Artyuhova, Lyudmila. "ENSURING THE SAFETY OF METAL STRUCTURES IN CONSTRUCTION." Construction and Architecture 9, no. 4 (December 18, 2021): 1–5. http://dx.doi.org/10.29039/2308-0191-2021-9-4-1-5.

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The author considers the main methods of fire protection for residential and public buildings and structures. The efficiency of metal structures is analyzed, the latest methods of corrosion and fire protection of metal structures are selected. For the plastering, cladding and coating methods, a table of the required thickness in relation to the fire resistance limits was compiled. Based on this table, graphical and empirical dependences for the 30k1 I-beam column are constructed, showing the dependence of temperature on time and the limits of fire resistance on the reduced coating thickness. According to the graphic data, the most economical method of fire protection was chosen, but the resulting deflections exceed the limit according to current standards.

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10

Zolnikov, Konstantin, N. Gamzatov, Svetlana Evdokimova, Andrey Potapov, Roman Dopira, Yuriy Kucherov, Igor' Yanochkin, Sergey Vital'evich Stoyanov, and Aleksey Plotnikov. "Modeling of processes in semiconductor structures under radiation exposure." Modeling of systems and processes 15, no. 4 (December 13, 2022): 106–15. http://dx.doi.org/10.12737/2219-0767-2022-15-4-106-115.

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The radiation impact of outer space has an impact on electronic equipment and their characteristics change. The paper considers the simulation of the process of motion of holes generated in the oxide, which cause local deformation of the potential field of the lattice. Jumps of polarons make the motion of holes dispersed and highly dependent on temperature and oxide thickness. The article presents the temperature dependences of the voltage shift after a single radiation pulse. When holes move to the Si/SiO2 interface, some of the holes are captured by traps. The effect of the influence of the capture cross section on the increase in holes in traps is noticeable in the electrical dependence of the increase in the number of oxide traps immediately after irradiation. The graphs of the dependence of the threshold voltage shift due to oxide traps on the electric field in the oxide are plotted in this work. Immediately after its appearance, the charge of oxide traps begins to be neutralized. To study this process, time, temperature, and electrical dependences are plotted, and the ratio of trapped electrons to the number of trapped holes is shown for dry and wet gate oxide technologies at different oxide thicknesses. Thus, the influence of temperature and radiation influences on the motions of holes and oxide traps in semiconductor structures is shown.

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11

McDaniel, J. G., and J. H. Ginsberg. "Thickness Expansions for Higher-Order Effects in Vibrating Cylindrical Shells." Journal of Applied Mechanics 60, no. 2 (June 1, 1993): 463–69. http://dx.doi.org/10.1115/1.2900816.

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In the spirit of Mindlin and others who have used series expansions to express transverse dependences in thin bodies, the present work uses Ritz expansions in a variational formulation for cylindrical shell vibrations. By expanding displacements in spatial coordinates, integral expressions for strain and kinetic energy are converted to quadratic sums involving time-dependent generalized coordinates. Hamilton’s principle provides ordinary differential equations for these coordinates. This view-point yields physical insight into the mechanisms of energy storage and avoids the geometrically thin assumption inherent to many formulations. A set of Legendre polynomials multiplied by a radial factor represent the radial dependences of displacement components, while circumferential variations are represented by sinusoidal functions. Excellent agreement in natural frequencies is found between this approach and analytical solutions over the entire range of shell thicknesses, including the limiting case of a solid cylinder. Comparisons to several thin shell theories are given, leading to conclusions about the range of validity of these theories.

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12

Malyi, Oleksandr I., Kostiantyn V. Sopiha, Ihor Radchenko, Ping Wu, and Clas Persson. "Tailoring electronic properties of multilayer phosphorene by siliconization." Physical Chemistry Chemical Physics 20, no. 3 (2018): 2075–83. http://dx.doi.org/10.1039/c7cp06196j.

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13

Ichihara, Katsutarou, Senji Shimanuki, and Nobuaki Yasuda. "Compositional and Thickness Dependences of Thermo-magnetic Properties for TbCo Films." Japanese Journal of Applied Physics 26, S4 (January 1, 1987): 15. http://dx.doi.org/10.7567/jjaps.26s4.15.

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14

Marchenkov, Artem, Dmitriy Chernov, Daria Zhgut, Anastasia Pankina, Ekaterina Rudenko, Anton Poroykov, Ekaterina Kulikova, and Tatiana Kovaleva. "Investigation of the Scale Factor Impact on the Results of Acoustic Emission Monitoring of the Steel Specimens Tension Process." Applied Sciences 12, no. 16 (August 19, 2022): 8280. http://dx.doi.org/10.3390/app12168280.

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The research is devoted to steel structure diagnostics by the acoustic emission (AE) method. The existing regulatory documents for AE diagnostics of metals and alloys do not take into account some critical factors, among which one is the scale factor should be highlighted. As a result, this can lead to an unreliable assessment of the danger degree of defects in structures when using standard AE diagnostic criteria. This paper presents a quantitative assessment of the scale factor impact on the AE data during the static tension test of steel specimens to failure. Experimental studies were carried out on flat specimens of various thicknesses with a side notch made of high-quality alloyed steel 30 KhGSA. It was established that AE data changed (rise in the AE signals amplitudes and AE activity) within the increase of specimen thickness. Growth in the recorded AE signals cumulative energy was registered with a greater specimen thickness. Partial correlation dependences of the mean count frequency and cumulative energy of AE signals on the specimen thickness were obtained. It was shown that such an effect occurred due to both a general increase in the deformed metal volume and greater strain intensity during the tension of thick specimens. The obtained dependences may contribute to the development of AE diagnostics of metallic materials which is invariant to the scale factor impact.

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15

Aslanov, T. G., and S. A. Ibragimov. "STUDY OF THE TOPOLOGY OF THE VIVALDI ANTENNA WITH A MIRROR ARRANGEMENT OF THE PETALS." Herald of Dagestan State Technical University. Technical Sciences 45, no. 3 (May 12, 2019): 76–84. http://dx.doi.org/10.21822/2073-6185-2018-45-3-76-84.

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Objectives. In work questions of a research of topology of the antenna of Vivaldi with a mirror arrangement of petals are considered.Method. By modeling in the program CST MicroWave Studio environment collecting necessary data, in particular dependence of width of the directional pattern on curvature and a distance from the middle of the top part of the antenna to the petal antenna petals is carried out.Result. Graphic dependences of curvature of petals and size of a distance from the middle of the top part of the antenna to the petal on directional pattern width in two planes for various frequencies are constructed. Approximation of the received dependences for two planes θ = 900 (the antenna plane) and φ = 00 is carried out (the plane perpendicular the antenna planes). The equations of the approximating curves for various frequencies are received. The analysis of change of curve dependences of curvature of petals and width of a distance from the middle of the top part of the antenna to the petal from directional pattern width upon transition from one frequency is carried out to another. The dependence of the standing wave ratio (VSWR) of the antenna on teflon thickness is investigated. The dependence of a strip of working frequencies on the sizes of the antenna is investigated.Conclusion. Dependences of topology of the antenna on directional pattern width on the range of frequencies of the antenna are revealed. Problems of construction and optimization of model of the set characteristics are solved. The mathematical model allowing depending on the set frequency and width of the directional pattern is received to receive necessary topology of petals of the antenna.

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16

Kondrat, R. M., M. I. Shchepanskyi, and L. I. Khaidarova. "The influence of contamination of the bottom-hole formation zone and the of perforation channels parameters on the productivity of gas wells." Prospecting and Development of Oil and Gas Fields, no. 3(76) (September 27, 2020): 23–32. http://dx.doi.org/10.31471/1993-9973-2020-3(76)-23-32.

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The reasons and nature of contamination of the bottomhole zone of wells are characterized. The structure of the skin effect is revealed. The characteristics of the types of well completion and the main parameters that are necessary to determine the skin effect are given. For the conditions of a hypothetical well, using the PipeSim program from Schlumberger, the influence of the permeability and thickness of the contaminated bottomhole formation zone on the value of the skin effect is investigated. The graphical dependences of the skin effect of the contaminated zone on its thickness and permeability are shown. The results of graphical dependencies are processed using statistical analysis. According to the research results, the value of the skin effect increases with the decrease in the permeability of the contaminated zone relative to the permeability of the productive formation and with the increase in the radius of the contaminated zone. The improvement in the filtration properties of the bottomhole formation zone occurs with the increase in the permeability of the contaminated zone compared to the formation permeability. The optimal values of the permeability and thickness of the contaminated zone are obtained, above which the skin effect practically does not change. The study of the influence of the quantity and size (length and diameter) of perforation channels per one meter of the open layer thickness is carried out. The research results are shown on the graphical dependences of gas flow rate and bottomhole pressure on the number of perforations per one meter of the open formation thickness, their length and diameter. The use of perforation channels that pass through the conta-minated zone has been substantiated to improve the hydrodynamic connection of the formation with the well and increase the gas production rate. According to the results of studies carried out using the McLeod model, the optimal diameter of the perforation channels is 0,029 m, the length of the channels is 0,296 m, and the number of channels per meter of the open formation thickness is 16.

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17

Сясько and Vladimir Syasko. "About MFL Technology Application for Ship Plating Corrosion Damages Detection." NDT World 18, no. 3 (September 1, 2015): 7–10. http://dx.doi.org/10.12737/12563.

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Introduction. The article considers matters on ensuring entire nondestructive inspection of ship plating residual thickness with the use of Magnetic Flux Leakage (MFL) technique. The work aim is optimization of measuring transducers magnetic system parameters in order to guarantee the required sensitivity level at the plating thickness range of 3÷16 mm. Method. Physical and mathematical models of transducers were developed; the finite-element method was used for formulating the optimization criteria. Results. Dependences have been obtained that link tested thicknesses range and measurement error with magnetic system geometry and magnetization modes. The influence of nuisance parameters has also been studied. Conclusion. A set of measuring transducers for entire ship plating residual thickness measurements as well as techniques for adjustment and testing for pitting and planar corrosion detection have been developed as a result of this work.

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18

Belmeguenai, M., D. Berling, F. Zighem, and S. M. Chérif. "Damping and Magnetic Anisotropy of Epitaxial Fe1.7Ge Ultrathin Films Grown on Ge(111) Substrates." SPIN 06, no. 04 (December 2016): 1640012. http://dx.doi.org/10.1142/s2010324716400129.

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6, 10 and 20[Formula: see text]nm thick hexagonal Fe[Formula: see text]Ge thin films have been grown on face-centered-cubic Ge(111) substrates by molecular beam epitaxy. X-ray diffraction investigations revealed an excellent epitaxy of the Fe[Formula: see text]Ge films, with crystallographic [Formula: see text] and [Formula: see text] axes lying in the sample plane. Ferromagnetic resonance, magneto-optical Kerr effect and transverse bias initial inverse susceptibility and torque (TBIIST) measurements reveal that the in-plane anisotropy results from the superposition of a uniaxial and a sixfold symmetry terms. The sixfold anisotropy field, which is in agreement with the crystal structure of the samples, increases with the film thickness suggesting an enhancement of the sample quality, while the small uniaxial anisotropy field does not show regular thickness dependence. Frequency and angular dependences of the FMR linewidth show two-magnon scattering and inhomogeneities contributions which depend on the film thickness. A Gilbert damping parameter as low as 0.0064 is found.

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19

Ганьшина, Е. А., Л. Л. Голик, З. Э. Кунькова, Г. С. Зыков, Ю. В. Маркин, Ю. А. Данилов, and Б. Н. Звонков. "О фазовом разделении в слоях (Ga,Mn)As, полученных ионной имплантацией и последующим лазерным отжигом." Физика твердого тела 61, no. 3 (2019): 465. http://dx.doi.org/10.21883/ftt.2019.03.47237.270.

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AbstractIn this paper, we present the results of studies of the spectral, temperature, and field dependences of the transversal Kerr effect in Ga_1 – _ x Mn_ x As ( x = 0.0066–0.033) layers produced by ion implantation and subsequent pulsed laser annealing. The complicated nonmonotonous nature of the temperature dependences of the transversal Kerr effect and its dependence on the measurement range indicate a magnetic inhomogeneity of the layers. The reasons for the inhomogeneity can be the Gaussian distribution of Mn over the thickness of the layers and the electron phase separation in them. The appearance of new features in the spectra of the transversal Kerr effect is explained by the presence in the doped semiconductor matrix of nanoregions with a higher carrier concentration and a higher Curie temperature and a shift of the Fermi level into the valence band leading to an increase in the energy of optical transitions.

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20

Kosmatskiy, Yaroslav, Nikolai Fokin, Kseniya Yakovleva, Vladislav Nikolenko, Boris Barichko, and Sergei Zakharov. "Stress-Strain Behavior – Deformation Degree Relationship Investigation of Alloy CrNi60WTi." Tecnica Italiana-Italian Journal of Engineering Science 65, no. 1 (March 31, 2021): 105–7. http://dx.doi.org/10.18280/ti-ijes.650115.

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The article presents the results of a research of the dependence of the mechanical properties of the CrNi60WTi alloy on the degree of cold deformation. As part of the study, five samples were taken from a pipe with an outer diameter of 89.0 mm and a wall thickness of 11.0 mm. The samples were cold-deformed to varying degrees and static tensile tests were performed on an SSI MTSInsight tensile testing machine. Based on the test results, the dependences of the mechanical properties on the degree of cold deformation were calculated.

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21

Hijikata, Yasuto, Hiroyuki Yaguchi, and Sadafumi Yoshida. "Model Calculations of SiC Oxide Growth Rate at Various Oxidation Temperatures Based on the Silicon and Carbon Emission Model." Materials Science Forum 645-648 (April 2010): 809–12. http://dx.doi.org/10.4028/www.scientific.net/msf.645-648.809.

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We have tried to apply the oxidation model of SiC proposed previously, termed ‘Si-C emission model’, to the oxide growth rate at various oxidation temperatures. We have found that the model well reproduces the oxide thickness dependences of oxide growth rates for all of the temperatures measured for both of the SiC Si- and C-faces. We have estimated the temperature dependence of oxide depth profiles of Si and C interstitials by using the Si-C emission model, and discussed the structure at/near the SiC–oxide interface.

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22

Стефанович, Л. И. "Влияние дискообразных непроводящих включений на электропроводность материала на постоянном токе." Журнал технической физики 91, no. 2 (2021): 207. http://dx.doi.org/10.21883/jtf.2021.02.50353.188-20.

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The influence of non-conductive disk-like inclusions (fractures) on the conductivity of a conducting medium in direct current is considered. To find the additional specific electrical resistance due to cracks, a self-consistent problem for the current density has been solved. In this case, a hydrodynamic analogy was used between the motion of an ideal incompressible fluid during potential flow around solids and electric current flowing around fractures. The functional dependences of the resulting relative additional specific electrical resistance of the material on the fracturing coefficient for thick and thin samples are found. A graphical visualization of these dependences shows that for a thick specimen, for all real values of the coefficient of fracturing, it is linear and is determined by the shape of the fractures. For a thin sample, the dependence of the relative additional the specific electrical resistance of the material on the fracturing coefficient is proportional to the thickness of the sample and is nonlinear. The obtained dependences of the additional electrical resistivity can be used, in particular, as a non-invasive method for determining the fracturing coefficient of rock samples conducting electric current.

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Здоренко, В. Г., С. В. Барилко, С. М. Лісовець, and Д. О. Шипко. "ДОСЛІДЖЕННЯ ПРОХОДЖЕННЯ УЛЬТРАЗВУКОВИХ ХВИЛЬ КРІЗЬ ДВОШАРОВИЙ МАТЕРІАЛ ІЗ СКЛАДНОЮ СТРУКТУРОЮ ПРИ КОНТРОЛІ ЙОГО ТЕХНОЛОГІЧНИХ ПАРАМЕТРІВ." Bulletin of the Kyiv National University of Technologies and Design. Technical Science Series 142, no. 1 (June 3, 2020): 50–62. http://dx.doi.org/10.30857/1813-6796.2020.1.5.

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Investigate the passage of ultrasonic waves through a two-layer material with a complex structure with non-contact control of its technological parameters. A non-contact ultrasonic method was used in the work to control technological parameters of materials with a complex structure, which takes into account the attenuation of ultrasonic waves. It is substantiated that the attenuation of an ultrasonic signal for a material with significant pores during its transverse sounding can be neglected compared to attenuation in a material without through pores. The results of studies of the influence of the thickness of a material with pores on the amplitude ratios of ultrasonic waves are presented. The dependences of the amplitudes of ultrasonic waves are obtained, one of which passes through a two-layer continuous material, and the other passes through a two-layer material with pores, taking into account the dependence of their attenuation on the thickness of the material. In this work, we obtained the dependences of the phase shift of ultrasonic waves, which were reflected from a two-layer material without pores, and waves reflected from a two-layer material with pores, on the total thickness of the controlled material, if we compare the phase of these waves with incident vibrations. Also obtained are the dependences of the change in wave amplitudes over time for a pulsed ultrasonic signal passing through a controlled material. It is proposed to use a pulsed ultrasonic signal for operational non-contact control of technological parameters of bilayer materials with a complex structure. The analysis showed that the obtained expressions for pulsed ultrasonic signals that can interact with porous materials can be used to create new methods and means of non-destructive non-contact control of technological parameters of materials with a complex structure. The aforementioned will make it possible to create complex integrated and universal contactless control devices for various technological parameters for composite materials with pores, which today are subjected only to destructive contact control, which does not allow operational monitoring directly at the plant.

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Prodous, Oleg A., Dmitriy I. Shlychkov, and Ivanna A. Abrosimova. "Permissible filling level in pipes of gravity water networks with internal deposits." Vestnik MGSU, no. 8 (August 2022): 1064–72. http://dx.doi.org/10.22227/1997-0935.2022.8.1064-1072.

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Introduction. of the hydraulic characteristics of concrete pipes with a diameter of 400 mm with the values for pipes of the same diameter with different thicknesses of the sediment layer in the flume of the pipes. Materials and methods. Above the flow of waste liquid, the rules for the operation of gravity sewerage networks and current regulations always provide for a free space between the roof of the pipe and the surface of the flow, which ensures ventilation of the network and the transported waste liquid to remove the resulting gases released from the flow. Therefore, the greater the filling value in the pipes Hact, the greater the value of the thickness of the deposit layer h. The calculated dependences derived by the authors for the hydraulic calculation of gravity pipes with internal deposits are used. Results. The existence of a dependence of the actual degree of filling of pipes on the thickness of the layer of deposits in their flume was confirmed. The hydraulic slope values were compared for new concrete pipes and pipes with different thicknesses of the sediment layer in their flume. A specific example is considered, confirming the existence of a dependence of the actual degree of filling of pipes on the thickness of the layer of deposits in their tray part. Measures are indicated that increase the level of operation of sewerage networks from different types of materials. The change in the value of the actual filling level Hact in a gravity pipeline is shown, depending on the thickness of the deposit layer h in its flume part. Conclusions. It is shown that the need for hydrodynamic cleaning of sewerage networks depends on the actual level of their filling. Measures are proposed to ensure an increase in the level of operation of sewerage networks with deposits in the tray part of pipes to meet the requirements of regulatory documents.

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Kim, S. W., J. Y. Lee, S. S. Lee, E. J. Hahn, and D. G. Hwang. "NiO Thickness Dependences of Perpendicular Magnetic Anisotropy in the [CoFe/Pt] Multilayers." Journal of Magnetics 9, no. 4 (December 1, 2004): 121–24. http://dx.doi.org/10.4283/jmag.2004.9.4.121.

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Chzhan, A. V., S. A. Podorozhnyak, A. N. Shahov, D. A. Velikanov, and G. S. Patrin. "Thickness dependences of coercivity in three layer films obtained by chemical deposition." Journal of Physics: Conference Series 1389 (November 2019): 012118. http://dx.doi.org/10.1088/1742-6596/1389/1/012118.

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Gao, X. S., and J. Wang. "Thickness dependences of ferroelectric and dielectric properties in (Bi3.15Nd0.85)Ti3O12 thin films." Journal of Applied Physics 99, no. 7 (April 2006): 074103. http://dx.doi.org/10.1063/1.2185838.

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Zhong, Zhiyong, Yoshihiro Sugiyama, and Hiroshi Ishiwara. "Thickness Dependences of Polarization Characteristics in Mn-Substituted BiFeO3Films on Pt Electrodes." Japanese Journal of Applied Physics 47, no. 8 (August 8, 2008): 6448–51. http://dx.doi.org/10.1143/jjap.47.6448.

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29

Демидов, Е. В., В. М. Грабов, В. А. Комаров, А. Н. Крушельницкий, А. В. Суслов, and М. В. Суслов. "Особенности проявления квантового размерного эффекта в явлениях переноса в тонких пленках висмута на подложках из слюды." Физика и техника полупроводников 53, no. 6 (2019): 736. http://dx.doi.org/10.21883/ftp.2019.06.47718.27.

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The dependences of the resistivity, magnetoresistance,and Hall coefficient on the sample thickness were studied forthin bismuth films on mica at 77 K. We discovered quantum sizeoscillations of electrical and galvanomagnetic properties for filmswith the thickness less than 50 nm. The charge carrier free path isestimated. The reasons for deviation of the observed experimentaldependences from the simple quantum size effect theory in thesemimetal films are discussed.

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30

Osipov, Sergei P., Sergei Chakhlov, Daniyar Kairalapov, and Oleg Osipov. "The Mathematical Model of the Broadband Transmission X-Ray Thickness Gauge." Materials Science Forum 970 (September 2019): 210–18. http://dx.doi.org/10.4028/www.scientific.net/msf.970.210.

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The mathematical model of the broadband transmission X-ray thickness gauge is developed. The mathematical model consists of sectors: generation and transformation of radiometric signals; equation of transmission X-ray thickness gauge; error estimation of thickness measurement; performance rating. The example of the use of the proposed model to calculate of the transmission X-ray thickness gauge for aluminum items is provided. In the example the dependences of integral mass X-ray attenuation coefficients and the thickness of monitored objects made from aluminum are calculated. The range of optimum measured thickness depending on the maximum X-ray energy was selected, the measurement time to provide the desired thickness measurement error was estimated. The possibility of measuring the thickness of a cooper test object for a wide beam conditions has been experimentally confirmed.

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31

Abdullayev, N. R. "Geological structure of South Caspian depression and onshore of Azerbaijan based on temperature data and gravimetric modelling." Azerbaijan Oil Industry, no. 6 (June 15, 2020): 4–10. http://dx.doi.org/10.37474/0365-8554/2020-6-7-4-10.

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The paper aims to justify the thickness of sedimentary cover along the aquatory of South Caspian basin and Azerbaijan onshore (including South and Middle Kur basin and Yevlakh-Aghjabedy downfall), the cover thickness of crystalline basement, specifying its structural position and key tectonic borders, as well as the confirmation of some issues on geodynamic evolution. Such comparison was carried out via published seismic temperature, gravimetric and magnitometric data. Definite dependences of geothermal gradients, the thickness of sedimentary cover and crystalline basement depth have been specified.

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32

Гармашов, С. И. "О скорости термомиграции жидких цилиндрических включений в кристалле в стационарных тепловых условиях." Физика твердого тела 61, no. 12 (2019): 2303. http://dx.doi.org/10.21883/ftt.2019.12.48538.19ks.

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Based on model ideas about the cross-sectional shape of a liquid cylindrical inclusion migrating through a crystal under the action of a temperature gradient in the case of the stationary thermal conditions, the dependences of the velocity and cross-sectional shape of the inclusion on its cross-sectional area have been calculated and analyzed for different values of the specific interfacial energy, the degree of its anisotropy, and the degree of difficulty of interface processes. The possibility of a nonmonotonic dependence of the velocity of the cylindrical inclusion on the area and thickness of its cross section has been shown.

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33

Chlebus, Radek, Jakub Chylek, Dalibor Ciprian, and Petr Hlubina. "Surface Plasmon Resonance Based Measurement of the Dielectric Function of a Thin Metal Film." Sensors 18, no. 11 (October 30, 2018): 3693. http://dx.doi.org/10.3390/s18113693.

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A spectral method based on surface plasmon resonance (SPR) in air is used to measure the dielectric function of a thin metal film. The method utilizes the spectral dependence of the ratio of the reflectances of p- and s-polarized waves measured in the Kretschmann configuration at different angles of incidence. By processing these dependences in the vicinity of a dip, or equivalently near the resonance wavelength, and using the dispersion characteristics of a metal film according to a proposed physical model, the real and imaginary parts of the dielectric function of the metal can be determined. The corresponding dielectric function of the metal is obtained by a least squares method for such a thickness minimizing the difference between the measured and theoretical dependence of the resonance wavelength on the the angle of incidence. The feasibility of the method is demonstrated in measuring the dielectric function of a gold film of an SPR structure comprising an SF10 glass prism and a gold coated SF10 slide with an adhesion film of chromium. The dielectric function according to the Drude–Lorentz model with two additional Lorentzian terms was determined in a wavelength range from 534 to 908 nm, and the results show that the gold film is composed of homogenous and rough layers with thicknesses 42.8 nm and 2.0 nm, respectively. This method is particularly useful in measuring the thickness and dielectric function of a thin metal film of SPR structures, directly in the Kretschmann configuration.

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Звонков, Б. Н., О. В. Вихрова, Ю. А. Данилов, М. В. Дорохин, И. Л. Калентьева, А. В. Кудрин, А. В. Здоровейщев, Е. А. Ларионова, В. А. Ковальский, and О. А. Солтанович. "Диодные гетероструктуры с ферромагнитным слоем (Ga, Mn)As." Физика твердого тела 62, no. 3 (2020): 373. http://dx.doi.org/10.21883/ftt.2020.03.48999.619.

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The diode p-(Ga,Mn)As/n-InGaAs/n+-GaAs heterostructures, which differ in thickness (from 5 to 50 nm) of a diluted magnetic semiconductor (Ga,Mn)As layer, were fabricated and studied. We found the negative magnetoresistance effect, reaching 6–8% in a 3600 Oe magnetic field. The effect was conserved up to temperatures of 70–80 K and associated with a decrease in charge carrier scattering due to ferromagnetic ordering in the (Ga,Mn)As layer. The dependence of the magnetoresistance on the forward bias voltage is nonmonotonic with the maximum magnetoresistance and its observation voltage range depending on the (Ga,Mn)As layer thickness. The magnetic field dependences of the magnetoresistance have a hysteretic shape due to the influence of tensile stresses in the (Ga,Mn)As layer grown on top of the relaxed InGaAs material on the appearance of the magnetization component, perpendicular to the structure surface.

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35

Коротун, А. В., and А. А. Коваль. "Оптические свойства сферических металлических наночастиц, покрытых слоем оксида." Журнал технической физики 127, no. 12 (2019): 1032. http://dx.doi.org/10.21883/os.2019.12.48705.133-19.

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In the work of the classical theory, the optical properties of an ensemble of metallic nanoparticles coated with an oxide layer are investigated. The influence of electron scattering mechanisms on the polarizability of nanoparticles is analyzed. The limiting case of a thin oxide layer is considered, for which analytical expressions are obtained for the real and imaginary parts of the polarizability. The evolution of the frequency dependences of the polarizability and extinction coefficient with varying particle size and oxide layer thickness is studied. It is shown that taking into account the size dependence of the surface component of the relaxation time leads to a change in the nature of the size dependence of the frequency of surface plasmons of bilayer nanoparticles.

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36

Rodionova, Valeria, Irina Dzhun, Kseniay Chichay, Sergey Shevyrtalov, and Nikolai Chechenin. "Enhancement of Exchange Bias in NiFe/IrM, IrMn/NiFe and NiFe/IrMn/NiFe Structures with Different Thickness of Antiferromagnetic Layer." Solid State Phenomena 233-234 (July 2015): 427–30. http://dx.doi.org/10.4028/www.scientific.net/ssp.233-234.427.

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The Influence of the ferromagnetic (FM) and antiferromagnetic (AFM) layers position and of the thickness of antiferromagnetic (AFM) layer on magnetic properties of FM/AFM bilayer structures was studied. Angular dependences of the coercive force and exchange bias field were analyzed for NiFe/IrMn bilayer structures with different thickness of AFM layer. In some samples we observed the maximum values of the exchange bias field in the directions different from the magnetic easy axis.

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37

Udalov, Andrey A., Aleksander V. Udalov, and Sergey V. Parshin. "Influence of the Profile Radius of the Deforming Roller on the Limit Degree of Deformation in the Process of Flow Forming." Materials Science Forum 946 (February 2019): 800–806. http://dx.doi.org/10.4028/www.scientific.net/msf.946.800.

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A theoretical investigation of the influence of the profile radius of the deforming roller on the limiting degrees of deformation in the process of flow forming is performed. Analytical and graphical dependencies allowing to determine the limiting degrees of deformation are obtained depending on the ratio of the profile radius of the roller to the initial thickness of the workpiece wall. The main practical ways of using the obtained dependences are considered. The results of the theoretical study are in good agreement with the known experimental data. The developed engineering technique can be used in designing the process of flow forming of cylindrical blanks by a torus roller.

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38

Nasriddinov, S. S., and M. A. Mujdinova. "DIGITAL MODELLING OF OPTIMIZATION PROCESS OF ANTIREFLECTION COVERING FOR SILICON SOLAR CELLS." National Association of Scientists 1, no. 29(56) (July 14, 2020): 58–60. http://dx.doi.org/10.31618/nas.2413-5291.2020.1.56.236.

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Results of research of influence of single ne and multilayered antireflection coverings on optical characteristics of silicon are discussed. Results received by program system "PVlighthouse" with the appendix “STGraphs”, developed by authors on a basis “C#9.0”. Spectral curve dependences of an indicator of absorption of light on a thickness of an antireflection covering and base silicon are resulted. Using of multilayered antireflection coverings aren’t sufficient for keeping of absorption level of light at small thickness of silicon. It is expedient to use surfaces texturing wich promote more effective lengthening of a beams way of in a thickness of silicon.

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39

Здоренко, В. Г., С. В. Барилко, С. М. Лісовець, Д. О. Шипко, В. М. Василенко, and Б. М. Палій. "ДОСЛІДЖЕННЯ ВІДБИТТЯ УЛЬТРАЗВУКОВИХ ХВИЛЬ ВІД ОДНОШАРОВИХ ТЕКСТИЛЬНИХ ПОЛОТЕН ТА ДВОШАРОВИХ ТЕКСТИЛЬНИХ ПАКЕТІВ ІЗ РІЗНИМ РОЗМІРОМ ПОР." Bulletin of the Kyiv National University of Technologies and Design. Technical Science Series 148, no. 4 (March 10, 2021): 87–97. http://dx.doi.org/10.30857/1813-6796.2020.4.8.

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Investigate the influence of single-layer textile fabrics and two-layer textile bags on the parameters of ultrasonic waves that interact with them. In particular, to investigate the dependence of the complex reflection coefficient of ultrasonic waves on the total thickness and basis weight of textile material. Methodology. The analytical part of the study consisted in obtaining an expression for the complex reflection coefficient of ultrasonic waves and in modeling its dependence on the thickness and basis weight of different textile materials. The proposed method of control of these technological parameters consists in irradiation of textile materials with ultrasonic waves with the subsequent reception of the waves reflected from textile material, their digitization and carrying out the computer analysis of the received results. Findings. Analytical expressions are obtained that relate the thickness and basis weight of single-layer canvases, two-layer textile bags with a complex spatial structure, on the one hand, and the reflection coefficient of ultrasonic waves from such materials, on the other hand. Analytical calculations were made and mathematical modeling was performed based on the results of theoretical research. Originality. As a result of theoretical studies, it is determined how the thickness and properties of each of the two layers of porous textile materials affect the reflection of ultrasonic waves. This makes it possible on the basis of ultrasonic measurements to determine both the total thickness of textile materials and their basis weight with the accuracy required for their production. Practical value. The obtained analytical dependences are another step towards the creation of control and measuring equipment to determine the properties of single-layer textile fabrics and two-layer porous textile bags. This will help determine the overall thickness and basis weight of materials with a complex spatial structure.

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40

Lu, H. M. "Size Dependent Interface Energy of Nanomaterials." Solid State Phenomena 155 (May 2009): 3–70. http://dx.doi.org/10.4028/www.scientific.net/ssp.155.3.

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The reduction of size of the low dimensional materials leads to a dramatic increase of surface-to-volume ratio. The properties of a solid are essentially controlled by related surface/interface energies. Although such changes are believed to dominate behaviors of nanoscale structures, little experience or intuition for the expected phenomena, especially the size dependent properties and their practical implications, are modeled. In this contribution, the classic thermodynamics as a powerful traditional theoretical tool is used to model different bulk interface energies and the corresponding size dependences where emphasis on the size dependence of interface energy is given, which is induced by size dependence of coherent energy of atoms within nanocrystals. It is found that solid-vapor interface energy, liquid-vapor interface energy, solid-liquid interface energy, and solid-solid interface energy of nanoparticles and thin films fall as their diameters or thickness decrease to several nanometers while the solid-vapor interface energy ratio between different facets is size-independent and is equal to the corresponding bulk ratio. The predictions of the established analytic models without any free parameter, such as size and temperature dependences of these four kinds of interface energies, are in agreement with the experimental or other theoretical results of different kinds of low dimensional materials with different chemical bond natures.

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41

Nikytenko, A. L., V. I. Kostenko, V. I. Grygoruk, and V. F. Romaniuk. "THICKNESS DEPENDENCES OF HIGH-FREQUENCY MAGNETIC HYSTERESIS PROPERTIES IN SINGLE-CRYSTAL BARIUM HEXAFERRITE." Telecommunications and Radio Engineering 77, no. 7 (2018): 627–33. http://dx.doi.org/10.1615/telecomradeng.v77.i7.50.

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42

Dimmich, R., and J. Dryzek. "Energy and thickness dependences of optical coefficients for polycrystalline metallic double-layer films." Physical Review B 37, no. 12 (April 15, 1988): 7083–86. http://dx.doi.org/10.1103/physrevb.37.7083.

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43

Kovalenko, S. A. "Thickness dependences of optical constants for thin layers of some metals and semiconductors." Semiconductor Physics, Quantum Electronics and Optoelectronics 4, no. 4 (December 12, 2001): 353–57. http://dx.doi.org/10.15407/spqeo4.04.352.

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44

Nikytenko, A. L., V. I. Kostenko, V. I. Grygoruk, and V. F. Romaniuk. "Thickness dependences of high-frequency magnetic hysteresis properties in single-crystal barium hexaferrite." RADIOFIZIKA I ELEKTRONIKA 22, no. 3 (September 19, 2017): 33–36. http://dx.doi.org/10.15407/rej2017.03.033.

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45

Soldatenkova, M. D., A. D. Triznova, E. M. Baeva, P. I. Zolotov, A. I. Lomakin, A. I. Kardakova, and G. N. Goltsman. "Normal-state transport in superconducting NbN films on r-cut sapphire." Journal of Physics: Conference Series 2086, no. 1 (December 1, 2021): 012212. http://dx.doi.org/10.1088/1742-6596/2086/1/012212.

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Abstract High-quality thin NbN films are very crucial for realizing quantum devices. Here, we investigated electrical transport and noise properties of a series of thin NbN films of various thicknesses grown on r-cut sapphire substrate using a DC magnetron sputtering technique. The films exhibit non-uniform thickness dependences for superconducting transition temperature (Te ) and normal-state resistivity. Morphological characterization of NbN samples of various thicknesses reveals uniform structure in thin films and granular structure in thick films. By measuring transport and noise properties in a normal state, we observe that the granular structure of NbN films does not have a strong effect on resistivity and does not cause an additional source of current noise.

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46

Saliy, Ya P. "Classical Size Effects in Sb Doped SnTe Thin Films." Фізика і хімія твердого тіла 18, no. 1 (March 15, 2017): 75–77. http://dx.doi.org/10.15330/pcss.18.1.75-77.

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The possibility of obtaining strongly degenerate (> 4×1020 сm-3) SnTe thin films (d = 200 - 2000 nm) with p-type conductivity by thermal evaporation in vacuum of SnTe crystals doped with Sb, with subsequent condensation onto as (0001) mica and sytal substrates, was established. The thickness dependences of electro-physical properties of thin films were obtained. In this region of thickness there was growth of the carrier mobility with thickness, which is attributable to manifestation of classical size effect and interpreted in the framework of Fuchs-Sondheimer theory. These measurements show little correlation between the length of free path of charge cattiers and the lateral diameter of surface objects.

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47

Shalamay, L. I., E. Y. Mendosa, E. E. Maiorov, V. B. Lampusova, and N. S. Oksas. "Obtaining spectral dependences of the Omnichrome blocker transmittance in the visible region of the spectrum." Stomatology for All / International Dental review, no. 1(98) (March 22, 2022): 52–57. http://dx.doi.org/10.35556/idr-2022-1(98)52-57.

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This article to the study of the optical properties of Omnichrome blocker in the visible region of the spectrum is devoted. The relevance of the work is shown, since a high level of aesthetics of restoration in therapeutic dentistry is important. The article transmission spectra of dental restoration material are presented. The optical scheme and technical characteristics of the device are given, the appearance of the spectrometer is shown. The information confirms a strong dependence on the wavelengths in the range of 250…400 nm was obtained. The spectral transmission curves practically correspond in shape, no characteristic shifts of the spectral curves were observed. Samples with a thickness of 0.3 mm, 0.5 mm and more than 1 mm of Omnichrome blocker and it was found that with a thickness of 0.3, the sample passes 10% of light radiation were analyzed. This means that the thickness of the layer of this composite was sufficient for restoration work on the hard tissues of the tooth in any carious cavity.

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48

Хлюстова, А. В. "Динамическая модель подводного разряда." Письма в журнал технической физики 47, no. 19 (2021): 38. http://dx.doi.org/10.21883/pjtf.2021.19.51512.18882.

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A dynamic model of an underwater electric discharge is presented. The method is based on a mathematical description of the dependence of the solution conductivity on its thickness during the formation of a vapor-gas bubble. The time dependences of the current and the voltage drop across the cell were calculated using expressions relating the current and voltage to the resistance (conductivity) of the solution and taking into account the periodicity of the processes. The presented model makes it possible to accurately describe the dynamic characteristics of underwater discharges based on the physicochemical properties of the solution, which makes it possible to predict the behavior of the discharge when using solutions with specified properties.

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49

Anikin, К. A., A. V. Apelfeld, and I. O. Kondratskiy. "Study of influence of micro-arc oxidation process duration on the characteristics of thermal control coatings for space applications." Journal of Physics: Conference Series 2144, no. 1 (December 1, 2021): 012006. http://dx.doi.org/10.1088/1742-6596/2144/1/012006.

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Abstract Thermal control coatings were obtained on the AMg6 aluminum alloy with the aid of micro-arc oxidation (MAO) process. The dependences of the thickness, roughness, porosity and thermal control properties of the coating on MAO process duration were studied. The thermal control properties (solar absorbance αs and emissivity ε) were investigated by ultraviolet–visible-near infrared spectrophotometer instrument and solar absorption reflectometer. The analysis of thickness, roughness and MAO process duration influence on the thermal control properties of the coating was carried out.

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Aituganov, М. B., and I. М. Polyakova. "EQUATIONS FOR DETERMINING THE DYNAMIC CHARACTERISTICS OF ELASTIC ELEMENTS." Bulletin of Kazakh Leading Academy of Architecture and Construction 81, no. 3 (September 30, 2021): 72–81. http://dx.doi.org/10.51488/1680-080x/2021.3-09.

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In this article, we consider equations for determining the dynamic characteristics of inhomogeneous elastic elements using refined elastic modulus and Poisson's coefficients depending on the concentration of reinforcing fibers. The dependences of the first three natural frequencies of the seamless bellows on its thickness and depth of corrugation and the first two natural frequencies of the welded bellows on its thickness are identified and analyzed. The frequency response and frequency response of an accelerometer with a UE are obtained depending on its geometric parameters.

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