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Journal articles on the topic 'Modeling Magnetic Anisotropy'

Author: Grafiati

Published: 6 September 2023

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1

Ben, Tong, Yuqi Kong, Long Chen, Fangyuan Chen, and Xian Zhang. "Magnetostriction property modeling of silicon steel considering stress-induced and magnetocrystalline anisotropy." AIP Advances 13, no. 2 (2023): 025031. http://dx.doi.org/10.1063/9.0000421.

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This paper proposed an improved magnetostriction model for correlation of anisotropy in non-oriented (NO) silicon steel based on the free energy, which considers stress-induced and magnetocrystalline anisotropy. Firstly, the free energy model, which includes stress-induced anisotropy energy, the energy of magnetic field, and the anisotropic energy of magnetic crystals, is incorporated into the anhysteretic magnetization parameter M an. Then, to obtain the magnetic field and proposed model parameters related to stress-induced and magnetocrystalline anisotropy, the magnetostrictive strain loops

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2

Yamaguchi, Shinichi, Akihiro Daikoku, and Norio Takahashi. "Cogging torque calculation considering magnetic anisotropy for permanent magnet synchronous motors." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 23, no. 3 (2004): 639–46. http://dx.doi.org/10.1108/03321640410540548.

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This paper describes the cogging torque of the permanent magnet synchronous (PM) motors due to the magnetic anisotropy of motor core. The cogging torque due to the magnetic anisotropy is calculated by the finite element method using two kinds of modeling methods: one is the 2D magnetization property method, and the other is the conventional method. As a result, the PM motors with parallel laminated core show different cogging torque waveform from the PM motors with the rotational laminated core due to the influence of the magnetic anisotropy. The amplitudes of the cogging torque are different

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Nowicki, Michał, Roman Szewczyk, and Paweł Nowak. "Experimental Verification of Isotropic and Anisotropic Anhysteretic Magnetization Models." Materials 12, no. 9 (2019): 1549. http://dx.doi.org/10.3390/ma12091549.

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The anhysteretic magnetization curve is the key element of modeling magnetic hysteresis loops. Despite the fact that it is intensively exploited, known models of anhysteretic curve have not been verified experimentally. This paper presents the validation of four anhysteretic curve models considering four different materials, including isotropic, such as Mn-Zn soft ferrite, as well as anisotropic amorphous and nanocrystalline alloys. The presented results indicate that only the model that considers anisotropic energy is valid for a wide set of modern magnetic materials. The most suitable of the

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Akin, Meriem, Autumn Pratt, Jennifer Blackburn, and Andreas Dietzel. "Paper-Based Magneto-Resistive Sensor: Modeling, Fabrication, Characterization, and Application." Sensors 18, no. 12 (2018): 4392. http://dx.doi.org/10.3390/s18124392.

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In this work, we developed and fabricated a paper-based anisotropic magneto-resistive sensor using a sputtered permalloy (Ni 81 Fe 19 ) thin film. To interpret the characteristics of the sensor, we proposed a computational model to capture the influence of the stochastic fiber network of the paper surface and to explain the physics behind the empirically observed difference in paper-based anisotropic magneto-resistance (AMR). Using the model, we verified two main empirical observations: (1) The stochastic fiber network of the paper substrate induces a shift of 45 ∘ in the AMR response of the p

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Ježek, J., and F. Hrouda. "Software for modeling the magnetic anisotropy of strained rocks." Computers & Geosciences 28, no. 9 (2002): 1061–68. http://dx.doi.org/10.1016/s0098-3004(02)00023-7.

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6

Rogovoy, Anatoli A., and Olga S. Stolbova. "Microstructural Modeling of the Magnetization Process in Ni2MnGa Alloy Polytwin Crystals." Magnetochemistry 8, no. 8 (2022): 78. http://dx.doi.org/10.3390/magnetochemistry8080078.

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In this article, based on the theory of micromagnetism, a microstructural model of the behavior of the Heusler alloy in a magnetic field is constructed. The dynamics of the magnetic process is described by the Landau–Lifshitz–Gilbert equation. Using the Galerkin procedure, variational equations corresponding to the differential relations of the magnetic problem are written out. For numerical simulation, we consider the problem of magnetization of a Ni2MnGa alloy polytwin crystals, each grain of which is a twinned variant of martensite and has pronounced anisotropic properties. First, we consid

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Xiao, Xiao, Fabian Müller, Martin Marco Nell, and Kay Hameyer. "Modeling anisotropic magnetic hysteresis properties with vector stop model by using finite element method." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 41, no. 2 (2021): 752–63. http://dx.doi.org/10.1108/compel-06-2021-0213.

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Purpose This paper aims to use a history-dependent vector stop hysteresis model incorporated into a two dimensional finite elements (FE) simulation environment to solve the magnetic field problems in electrical machines. The vector stop hysteresis model is valid for representing the anisotropic magnetization characteristics of electrical steel sheets. Comparisons of the simulated results with measurements show that the model is well appropriate for the simulation of electrical machines with alternating, rotating and harmonic magnetic flux densities. Design/methodology/approach The anisotropy o

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8

Liu, Yikuo, Anton Ziolkowski, and Paul L. Stoffa. "Time evolution of the electric field using the rapid expansion method with pseudospectral evaluation of spatial derivatives — Part 2: Inclusion of anisotropy and the earth-air interface." GEOPHYSICS 84, no. 5 (2019): E323—E335. http://dx.doi.org/10.1190/geo2018-0143.1.

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We have evaluated an extension of the 3D 3C rapid-expansion method for time-domain electromagnetic modeling with pseudospectral evaluation of spatial derivatives that includes anisotropic conductivity and the earth-air interface. We found that transverse isotropic anisotropy can be included in the modeling with the manipulation of the conductivity tensor. We model the response of the earth-air interface by using the upward continuation of the time derivative of the magnetic induction. All three electric field components are collocated with the electric conductivities and are modeled independen

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Zhao, Yang, and H. Neal Bertram. "Micromagnetic modeling of magnetic anisotropy in textured thin‐film media." Journal of Applied Physics 77, no. 12 (1995): 6411–15. http://dx.doi.org/10.1063/1.359114.

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10

Zhang, Yue, Weisheng Zhao, Yahya Lakys, et al. "Compact Modeling of Perpendicular-Anisotropy CoFeB/MgO Magnetic Tunnel Junctions." IEEE Transactions on Electron Devices 59, no. 3 (2012): 819–26. http://dx.doi.org/10.1109/ted.2011.2178416.

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11

Bottauscio, Oriano, Fausto Fiorillo, Cinzia Beatrice, Ambra Caprile, and Alessandro Magni. "Modeling High-Frequency Magnetic Losses in Transverse Anisotropy Amorphous Ribbons." IEEE Transactions on Magnetics 51, no. 3 (2015): 1–4. http://dx.doi.org/10.1109/tmag.2014.2361534.

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12

Lee, Hochul, Albert Lee, Shaodi Wang, et al. "Analysis and Compact Modeling of Magnetic Tunnel Junctions Utilizing Voltage-Controlled Magnetic Anisotropy." IEEE Transactions on Magnetics 54, no. 4 (2018): 1–9. http://dx.doi.org/10.1109/tmag.2017.2788010.

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13

Smolin, Sergei V. "Modeling of Anisotropy Dynamics of the Proton Pitch Angle Distribution in the Earth’s Magnetosphere." Journal of Siberian Federal University. Mathematics & Physics 14, no. 5 (2021): 632–37. http://dx.doi.org/10.17516/1997-1397-2021-14-5-632-637.

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Last years the attention to research of anisotropy of the charged particle pitch angle distribution has considerably increased. Therefore for research of anisotropy dynamics of the proton pitch angle distribution is used the two-dimensional Phenomenological Model of the Ring Current (PheMRC 2-D), which includes the radial and pitch angle diffusions with consideration of losses due to wave-particle interactions. Experimental data are collected on the Polar/MICS satellite during the magnetic storm on October 21–22, 1999. Solving the non-stationary two-dimensional equation of pitch angle and radi

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14

Fuliang, Xiao, and Feng Xueshang. "Modeling Density and Anisotropy of Energetic Electrons Along Magnetic Field Lines." Plasma Science and Technology 8, no. 3 (2006): 279–84. http://dx.doi.org/10.1088/1009-0630/8/3/07.

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15

Ježek, J., and F. Hrouda. "A technique for numerical modeling of magnetic anisotropy to strain relationship." Physics and Chemistry of the Earth, Parts A/B/C 27, no. 25-31 (2002): 1247–52. http://dx.doi.org/10.1016/s1474-7065(02)00118-3.

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16

Carcione, José M., and Michael A. Schoenberg. "3-D ground‐penetrating radar simulation and plane‐wave theory in anisotropic media." GEOPHYSICS 65, no. 5 (2000): 1527–41. http://dx.doi.org/10.1190/1.1444841.

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Modeling ground‐penetrating radar (GPR) waves requires simulation of the 3-D full wavefield and the correct description of the electromagnetic (EM) properties. Magnetic and dielectric relaxations are described by relaxation functions associated with each principal component of the respective tensorial property. Anisotropy is modeled up to orthorhombic symmetry, i.e., the principal coordinate systems of the three EM material tensors coincide, and each property is described by three different principal components. The algorithm uses the pseudospectral method for computing the spatial derivatives

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17

Han, Bo, Yuguo Li, and Gang Li. "3D forward modeling of magnetotelluric fields in general anisotropic media and its numerical implementation in Julia." GEOPHYSICS 83, no. 4 (2018): F29—F40. http://dx.doi.org/10.1190/geo2017-0515.1.

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We have developed a finite volume (FV) algorithm for magnetotelluric (MT) forward modeling in 3D conductivity structures with general anisotropy. The electric and magnetic fields are discretized on a conventional staggered grid, which cannot directly address the full-tensor conductivity. To overcome this difficulty, an interpolation scheme is used to average different components of the electric field to the same position. We formulate the algorithm in pure matrix form and implement it in a new language, Julia, making the programming process highly efficient and leading to a code with excellent

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18

Chekanova, L. A., E. A. Denisova, Roman N. Yaroslavtsev, et al. "Micro Grid Frame of Electroless Deposited Co-P Magnetic Tubes." Solid State Phenomena 233-234 (July 2015): 64–67. http://dx.doi.org/10.4028/www.scientific.net/ssp.233-234.64.

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The morphology and magnetic characterization results of electroless deposited CoP coating on the copper microgrid with the mesh size of 50 microns are presented and discussed. The deposited coating is found to be well uniform by the thickness. Magnetic anisotropy in the plane of the grid has been studied by the hysteresis loops and the FMR spectra and discussed with the modeling of the grid as the frame grid system of magnetic tubes.

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19

Fahmy, Mohamed Abdelsabour. "A Nonlinear Fractional BEM Model for Magneto-Thermo-Visco-Elastic Ultrasound Waves in Temperature-Dependent FGA Rotating Granular Plates." Fractal and Fractional 7, no. 3 (2023): 214. http://dx.doi.org/10.3390/fractalfract7030214.

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The primary goal of this study is to create a nonlinear fractional boundary element method (BEM) model for magneto-thermo-visco-elastic ultrasound wave problems in temperature-dependent functionally graded anisotropic (FGA) rotating granular plates in a constant primary magnetic field. Classical analytical methods are frequently insufficient to solve the governing equation system of such problems due to nonlinearity, fractional order heat conduction, and strong anisotropy of mechanical properties. To address this challenge, a BEM-based coupling scheme that is both reliable and efficient was pr

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20

Зверев, В. В., Е. Ж. Байкенов та И. М. Изможеров. "Динамические перестройки трехмерной топологической структуры движущейся доменной границы в магнитной пленке при наличии случайных возмущений". Физика твердого тела 61, № 11 (2019): 2070. http://dx.doi.org/10.21883/ftt.2019.11.48410.226.

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Dynamic processes in a domain wall (DW) moving under a constant magnetic field in a soft-magnetic uniaxial film with in-plane anisotropy were studied using three-dimensional micromagnetic modeling. It was shown that the nature of the dynamics of topological transformations occurring in the DW can vary significantly due to disturbing factors depending randomly on coordinates or on time (spatially inhomogeneous anisotropy; magnetic field fluctuating in time). At the same time, typical configurations of the magnetization field in the vicinity of intrafilm vortex cores and singular (Bloch) points

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21

Ovcharenko, Sergei, Mikhail Gaponov, Alexey Klimov, et al. "Ultrafast manipulation of magnetic anisotropy in a uniaxial intermetallic heterostructure TbCo₂/FeCo." Journal of Physics D: Applied Physics 55, no. 17 (2022): 175001. http://dx.doi.org/10.1088/1361-6463/ac4a9a.

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Abstract We study experimentally and theoretically the dynamics of spin relaxation motion excited by a femtosecond pulse in the TbCo2/FeCo multilayer structures with different ratios of TbCo2 to FeCo thicknesses r d = d T b C o 2 / d F e C o . The main attribute of the structure is in-plane magnetic anisotropy that is artificially induced during sputtering under a DC magnetic field. The optical pump-probe method revealed strongly damped high-frequency oscillations of the dynamical Kerr rotation angle, followed by its slow relaxation to the initial state. Modeling experimental results using the

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22

Popov, V. V., and N. A. Buznikov. "Modeling the Giant Magnetoimpedance Effect in Amorphous Microwires with Induced Magnetic Anisotropy." Physics of Metals and Metallography 121, no. 11 (2020): 1033–38. http://dx.doi.org/10.1134/s0031918x20110071.

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23

Dobák, Samuel, Cinzia Beatrice, Vasiliki Tsakaloudi, and Fausto Fiorillo. "Magnetic Losses in Soft Ferrites." Magnetochemistry 8, no. 6 (2022): 60. http://dx.doi.org/10.3390/magnetochemistry8060060.

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We review the basic phenomenology of magnetic losses from DC to 1 GHz in commercial and laboratory-prepared soft ferrites considering recent concepts regarding their physical interpretation. This is based, on the one hand, on the identification of the contributions to the magnetization process provided by spin rotations and domain walls and, on the other hand, the concept of loss separation. It additionally contemplates a distinction between the involved microscopic dissipation mechanisms: spin damping and eddy currents. Selected experimental results on the broadband behavior of complex permea

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24

Morreeuw, J. P., A. Sangam, B. Dubroca, P. Charrier, and V. T. Tikhonchuk. "Electron temperature anisotropy modeling and its effect on anisotropy-magnetic field coupling in an underdense laser heated plasma." Journal de Physique IV (Proceedings) 133 (June 2006): 295–300. http://dx.doi.org/10.1051/jp4:2006133058.

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25

Beljakov, Igor, Velimir Meded, Franz Symalla, Karin Fink, Sam Shallcross, and Wolfgang Wenzel. "Magnetic anisotropy of graphene quantum dots decorated with a ruthenium adatom." Beilstein Journal of Nanotechnology 4 (July 10, 2013): 441–45. http://dx.doi.org/10.3762/bjnano.4.51.

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The creation of magnetic storage devices by decoration of a graphene sheet by magnetic transition-metal adatoms, utilizing the high in-plane versus out-of-plane magnetic anisotropy energy (MAE), has recently been proposed. This concept is extended in our density-functional-based modeling study by incorporating the influence of the graphene edge on the MAE. We consider triangular graphene flakes with both armchair and zigzag edges in which a single ruthenium adatom is placed at symmetrically inequivalent positions. Depending on the edge-type, the graphene edge was found to influence the MAE in

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26

Chérif, S. M., Y. Roussigné, M. Belmeguenai, et al. "Dynamic and Magnetotransport Properties of Perpendicularly Magnetized CoFeB Magnetic Tunnel Junctions." SPIN 06, no. 04 (2016): 1640010. http://dx.doi.org/10.1142/s2010324716400105.

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We present the study of the dynamic properties of CoFeB (CFB) based magnetic tunnel junctions (MTJ) by Brillouin light scattering spectroscopy and micro-strip ferromagnetic resonance technique as well as magnetoresistance measurements. Two different MTJs: single and double barrier systems have been investigated. The dynamic studies revealed mostly similar perpendicular anisotropy field for both CoFeB layers for the single barrier MTJ with the thickest CFB layers, while two sensibly different perpendicular anisotropy fields were revealed in the case of the double barrier MTJ with the thickest C

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27

Manière, Charles, Gabriel Kerbart, Christelle Harnois, and Sylvain Marinel. "Modeling sintering anisotropy in ceramic stereolithography of silica." Acta Materialia 182 (January 2020): 163–71. http://dx.doi.org/10.1016/j.actamat.2019.10.032.

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28

Xu, Bin, Ming-Jay Chow, and Yanhang Zhang. "Experimental and Modeling Study of Collagen Scaffolds with the Effects of Crosslinking and Fiber Alignment." International Journal of Biomaterials 2011 (2011): 1–12. http://dx.doi.org/10.1155/2011/172389.

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Collagen type I scaffolds are commonly used due to its abundance, biocompatibility, and ubiquity. Most applications require the scaffolds to operate under mechanical stresses. Therefore understanding and being able to control the structural-functional integrity of collagen scaffolds becomes crucial. Using a combined experimental and modeling approach, we studied the structure and function of Type I collagen gel with the effects of spatial fiber alignment and crosslinking. Aligned collagen scaffolds were created through the flow of magnetic particles enmeshed in collagen fibrils to mimic the an

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Wang, Guanda, Yue Zhang, Jinkai Wang, et al. "Compact Modeling of Perpendicular-Magnetic-Anisotropy Double-Barrier Magnetic Tunnel Junction With Enhanced Thermal Stability Recording Structure." IEEE Transactions on Electron Devices 66, no. 5 (2019): 2431–36. http://dx.doi.org/10.1109/ted.2019.2906932.

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30

Liu, Shuang, Xiangyun Hu, Maurizio Fedi, and Rixiang Zhu. "Forward and inverse modeling of magnetic data under complex magnetism effects: Remanence, self‐demagnetization and magnetic anisotropy." Acta Geologica Sinica - English Edition 93, S1 (2019): 325. http://dx.doi.org/10.1111/1755-6724.14115.

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31

Landa, Alexander, Per Söderlind, Emily E. Moore, and Aurelien Perron. "Thermodynamics and Magnetism of YCo5 Compound Doped with Fe and Ni: An Ab Initio Study." Applied Sciences 10, no. 17 (2020): 6037. http://dx.doi.org/10.3390/app10176037.

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YCo5 permanent magnet exhibits high uniaxial magnetocrystalline anisotropy energy and has a high Curie temperature. These are good properties for a permanent magnet, but YCo5 has a low energy product, which is notably insufficient for a permanent magnet. In order to improve the energy product in YCo5, we suggest replacing cobalt with iron, which has a much bigger magnetic moment. With a combination of density-functional-theory calculations and thermodynamic CALculation of PHAse Diagrams (CALPHAD) modeling, we show that a new magnet, YFe3(Ni1-xCox)2, is thermodynamically stable and exhibits an

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32

One, Roxana-Alina, Sever Mican, Angela-Georgiana Cimpoeșu, Marius Joldos, Romulus Tetean, and Coriolan Viorel Tiușan. "Micromagnetic Design of Skyrmionic Materials and Chiral Magnetic Configurations in Patterned Nanostructures for Neuromorphic and Qubit Applications." Nanomaterials 12, no. 24 (2022): 4411. http://dx.doi.org/10.3390/nano12244411.

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Our study addresses the problematics of magnetic skyrmions, nanometer-size vortex-like swirling topological defects, broadly studied today for applications in classic, neuromorphic and quantum information technologies. We tackle some challenging issues of material properties versus skyrmion stability and manipulation within a multiple-scale modeling framework, involving complementary ab-initio and micromagnetic frameworks. Ab-initio calculations provide insight into the anatomy of the magnetic anisotropy, the Dzyaloshinskii–Moriya asymmetric exchange interaction (DMI) and their response to a g

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Bang, Jon, Arne Solstad, and Svein Mjaaland. "Formation Electrical Anisotropy Derived From Induction-Log Measurements in a Horizontal Well." SPE Reservoir Evaluation & Engineering 4, no. 06 (2001): 483–88. http://dx.doi.org/10.2118/75115-pa.

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Summary An existing theory describes how electrical anisotropy in the formationaffects the response of resistivity logging tools. We have related this theory to the processing of logging while drilling (LWD) induction logs and are thus able to calculate the anisotropic resistivities directly from the logs. The method has been demonstrated by application to logs from a horizontal well section. Anisotropy ratios of 2 to 5, and occasionally higher values, were obtained for this formation. We also addressed the accuracy of these numbers by using independent sets of input logs. The results indicate

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UESHIMA, Nobufumi, Masato YOSHIYA, and Hideyuki YASUDA. "Elucidation of Mechanism of Emergence of Magnetic Anisotropy in FePd by Phase-Field Modeling." Journal of the Japan Society for Precision Engineering 83, no. 5 (2017): 415–19. http://dx.doi.org/10.2493/jjspe.83.415.

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Elbidweihy, Hatem, Anthony S. Arrott, and Virgil Provenzano. "Modeling the Role of the Buildup of Magnetic Charges in Low Anisotropy Polycrystalline Materials." IEEE Transactions on Magnetics 54, no. 11 (2018): 1–5. http://dx.doi.org/10.1109/tmag.2018.2832294.

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Pirgazi, Hadi, Roumen H. Petrov, and Leo Kestens. "Modeling the Magnetic Properties of Non-Oriented Electrical Steels Based on Microstructural Parameters." Materials Science Forum 702-703 (December 2011): 734–37. http://dx.doi.org/10.4028/www.scientific.net/msf.702-703.734.

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Magnetic properties of electrical steels such as magnetization behavior and electrical losses are mainly related to chemical composition, crystallographic orientation and microstructure. By now, several models have been proposed to empirically correlate magnetic properties and affecting parameters. A quantitative model based on physical understanding of the interaction between the magnetic field variables (e.g. domain structure) and local microstructural variables (e.g. grain orientation and misorientation, grain boundary plane inclination) is still missing. To obtain a better understanding of

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van der Laan, G., K. Chesnel, M. Belakhovsky, et al. "Magnetic anisotropy of aligned magnetic stripe domains in FePd studied by soft x-ray resonant magnetic scattering, magnetic force microscopy and micromagnetic modeling." Superlattices and Microstructures 34, no. 1-2 (2003): 107–26. http://dx.doi.org/10.1016/j.spmi.2004.01.005.

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Starodubtsev, Evgenii. "Effect of small anisotropy and absorption on metamaterial applications: “non-ideal” features of propagation and tunneling of electromagnetic waves." EPJ Applied Metamaterials 5 (2018): 1. http://dx.doi.org/10.1051/epjam/2017014.

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For cases of isotropic, uniaxial, and biaxial electromagnetic metamaterials (MM), a comparative analysis of the effect of small deviations of local material parameters from “ideal” values on the realization of MM applications (“zero” media, the Veselago-Pendry superlens) has been carried out. On the basis of the detailed investigation of the solutions of dispersion equations, it is established that even a very small dielectric and (or) magnetic anisotropy of a general form is the universal “non-ideal” factor determining (to a much greater extent than small losses) the operability of those MM a

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Lim, Young Soo, Bae Gun Park, and Gil-Geun Lee. "Synthesis of N-type Bi2Te2.7Se0.3 Compounds through Oxide-Reduction Process and Related Thermoelectric Transport Properties." Korean Journal of Metals and Materials 60, no. 6 (2022): 463–70. http://dx.doi.org/10.3365/kjmm.2022.60.6.463.

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We present a study on the synthesis of Bi2Te2.7Se0.3 powders through an oxide reduction process and also on the effect of the oxide reduction process on the thermoelectric transport properties of the resulting Bi2Te2.7Se0.3 compounds. Starting materials of Bi2O3, TeO2 and SeO2 were mechanical milled for homogeneous mixing, and then oxidized to prepare complex oxide powders. The complex oxide powders were reduced at different reduction temperatures under hydrogen atmosphere, and a single phase of Bi2Te2.7Se0.3 could be achieved in the reduced powder, with shorter reduction times as the reductio

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Ahmed, Tanjina N., Christopher Selsor, Jitendra S. Tate, and Wilhelmus J. Geerts. "Magnetic behavior and chaining of strontium ferrite-nylon composite above the melting temperature." AIP Advances 13, no. 2 (2023): 025024. http://dx.doi.org/10.1063/9.0000596.

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To better understand Magnetic Field Assisted Additive Manufacturing (MFAAM) the effect of a magnetic field on the orientation and distribution of magnetic particles in a molten magnetic composite was studied. Vibrating Sample Magnetometer (VSM) measurements were made on Sr-ferrite/PA12 fused deposition modeling filaments of different packing fraction (5 and 40 wt. %). The rotation of the sample’s magnetic moment upon application of a field perpendicular to the easy axis was monitored with a biaxial VSM above the PA12’s softening temperature. The observed magnetic moment transients depend on th

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Lim, Hyein, Seungjun Lee, and Hyungsoon Shin. "A Survey on the Modeling of Magnetic Tunnel Junctions for Circuit Simulation." Active and Passive Electronic Components 2016 (2016): 1–12. http://dx.doi.org/10.1155/2016/3858621.

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Spin-transfer torque-based magnetoresistive random access memory (STT-MRAM) is a promising candidate for universal memory that may replace traditional memory forms. It is expected to provide high-speed operation, scalability, low-power dissipation, and high endurance. MRAM switching technology has evolved from the field-induced magnetic switching (FIMS) technique to the spin-transfer torque (STT) switching technique. Additionally, material technology that induces perpendicular magnetic anisotropy (PMA) facilitates low-power operation through the reduction of the switching current density. In t

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42

Luca, Delia, and Simona Miclăuş. "Two Dimensions Simulation of a Magnetotactic Bacteria Cell Exposed to an Electromagnetic Field at 3 GHz." International conference KNOWLEDGE-BASED ORGANIZATION 27, no. 3 (2021): 48–54. http://dx.doi.org/10.2478/kbo-2021-0088.

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Abstract The effect of the presence of magnetite nanoparticles inside biological objects when they are exposed to microwaves has not yet been investigated completely. Microwaves magnetic hyperthermia is a field under development, and the use of biogenic magnetite is a relatively new vista. In this regard, the present approach presents a first step in a modeling-simulation process focused on the computation of the absorbed power distribution in bacteria cells containing native magnetite nanoparticles in the form of chains (magnetosomes). The presented simulations’ results refer to the simplest

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Klokishner, Sophia I., Serghei M. Ostrovsky, Oleg S. Reu, et al. "Magnetic Anisotropy in the [CuIILTbIII(hfac)2]2Single Molecule Magnet: Experimental Study and Theoretical Modeling." Journal of Physical Chemistry C 113, no. 20 (2009): 8573–82. http://dx.doi.org/10.1021/jp8090842.

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Gaponov, Mikhail, Sergey Ovcharenko, Nikita Ilyin, and Elena Mishina. "Laser-Induced Magnetization Dynamics in Si-Doped Yttrium-Iron Garnet Film." Condensed Matter 7, no. 4 (2022): 55. http://dx.doi.org/10.3390/condmat7040055.

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We experimentally demonstrate that the excitation of a silicon-doped yttrium-iron garnet film by femtosecond laser pulses triggers a magnetization precession with an amplitude determined by the external magnetization direction. The maximum efficiency is achieved at the pump wavelength corresponding to the absorption maximum due to doping with silicon ions. Based on the azimuthal dependences of the precession amplitude and frequency, it is shown that the magnetization dynamics is induced by a thermal disruption of the magnetocrystalline anisotropy. By modeling hysteresis loops, it was found tha

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Raposo, Víctor, and Eduardo Martínez. "All optical writing and current-driven shifting of bits in ferrimagnetic strips: A micromagnetic study." AIP Advances 13, no. 1 (2023): 015120. http://dx.doi.org/10.1063/9.0000516.

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Nucleation of domains and domain walls by means of ultrashort laser pulses, and their current-driven shifting along a ferrimagnetic strip with high perpendicular magnetic anisotropy on top of a heavy metal, are both explored here by means of advanced micromagnetic modeling. Our results indicate that these systems are ideal candidates to develop high-density and high-efficient domain wall-based memory devices where the information is coded in series of bits in the form of perpendicular up and down domains flanked by chiral domain walls.

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Raposo, Victor, Rodrigo Guedas, Felipe García-Sánchez, M. Auxiliadora Hernández, Marcelino Zazo, and Eduardo Martínez. "Micromagnetic Modeling of All Optical Switching of Ferromagnetic Thin Films: The Role of Inverse Faraday Effect and Magnetic Circular Dichroism." Applied Sciences 10, no. 4 (2020): 1307. http://dx.doi.org/10.3390/app10041307.

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There is a lot of experimental evidence of All Optical Switching (AOS) by applying ultrashort laser pulses on ferromagnetic thin films with perpendicular magnetic anisotropy. However, the physical origin behind these processes remains under debate. In addition to the heating caused by the laser pulses, the Inverse Faraday Effect (IFE) and Magnetic Circular Dichroism (MCD) have been proposed as the most probable phenomena responsible for the observations of helicity-dependent AOS. Here, we review the influence of both phenomena by means of realistic micromagnetic simulations based on the Landau

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Bentley, J., J. E. Wittig, and T. P. Nolan. "Segregation In Cocrptta/Cr Magnetic Recording Media Measured By Eftem." Microscopy and Microanalysis 5, S2 (1999): 136–37. http://dx.doi.org/10.1017/s1431927600014008.

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Development of high-density longitudinal magnetic recording media (used for computer hard disks) with good noise performance and high thermal stability requires optimization of both alloy composition and processing methods. In CoCr(PtTa) thin films, intergranular Cr segregation is responsible for decoupling the magnetic exchange between the small ferromagnetic grains. The corresponding Cr depletion within the grains affects the “bulk” magnetic anisotropy. However, the nanoscale structural and chemical details that are needed for modeling and for guiding material development are not well unders

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Kools, Thomas J., Marnix C. van Gurp, Bert Koopmans, and Reinoud Lavrijsen. "Magnetostatics of room temperature compensated Co/Gd/Co/Gd-based synthetic ferrimagnets." Applied Physics Letters 121, no. 24 (2022): 242405. http://dx.doi.org/10.1063/5.0127694.

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Flexibility for interface engineering and access to all-optical switching of the magnetization make synthetic ferrimagnets an interesting candidate for advanced optospintronic devices. Moreover, due to their layered structure and disordered interfaces, they also bear promise for the emerging field of graded magnetic materials. The fastest and most efficient spin–orbit torque driven manipulation of the magnetic order in this material system generally takes place at compensation. Here, we present a systematic experimental and modeling study of the conditions for magnetization compensation and pe

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Śniadecki, Z. "The Influence of 3d and 4d Transition Metals on the Glass Forming Ability of Ternary FeCo-Based Alloys." Metallurgical and Materials Transactions A 52, no. 5 (2021): 1861–68. http://dx.doi.org/10.1007/s11661-021-06196-7.

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AbstractThermodynamic modeling was used to determine enthalpies of formation and other thermodynamic parameters describing glass forming ability of Fe-Co-TM (TM = V, Nb, Cr, Mo) alloys. FeCo-based alloys are considered as candidates for applications as high magnetic flux density materials due to their high magnetic saturation and low magnetic anisotropy. Nevertheless, mechanical properties, especially the lack of ductility, are their main weakness. Therefore, further optimization by vitrification, further heat treatment and alloying should be considered. As the most crucial step is the synthes

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Wang, Fengmao, Xiangli Zhang, Zongzhi Zhang, and Yaowen Liu. "Deterministic magnetization switching by spin–orbit torque in a ferromagnet with tilted magnetic anisotropy: A macrospin modeling." Journal of Magnetism and Magnetic Materials 527 (June 2021): 167757. http://dx.doi.org/10.1016/j.jmmm.2021.167757.

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