Готові списки джерел за темами / Novel Oxides - Magnetic Properties

Добірка наукової літератури з теми "Novel Oxides - Magnetic Properties"

Автор: Grafiati
Опубліковано: 7 вересня 2023

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Статті в журналах з теми "Novel Oxides - Magnetic Properties"

1

Nnadozie, Ebenezer C., and Peter A. Ajibade. "Multifunctional Magnetic Oxide Nanoparticle (MNP) Core-Shell: Review of Synthesis, Structural Studies and Application for Wastewater Treatment." Molecules 25, no. 18 (September 9, 2020): 4110. http://dx.doi.org/10.3390/molecules25184110.

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The demand for water is predicted to increase significantly over the coming decades; thus, there is a need to develop an inclusive wastewater decontaminator for the effective management and conservation of water. Magnetic oxide nanocomposites have great potentials as global and novel remediators for wastewater treatment, with robust environmental and economic gains. Environment-responsive nanocomposites would offer wide flexibility to harvest and utilize massive untapped natural energy sources to drive a green economy in tandem with the United Nations Sustainable Development Goals. Recent attempts to engineer smart magnetic oxide nanocomposites for wastewater treatment has been reported by several researchers. However, the magnetic properties of superparamagnetic nanocomposite materials and their adsorption properties nexus as fundamental to the design of recyclable nanomaterials are desirable for industrial application. The potentials of facile magnetic recovery, ease of functionalization, reusability, solar responsiveness, biocompatibility and ergonomic design promote the application of magnetic oxide nanocomposites in wastewater treatment. The review makes a holistic attempt to explore magnetic oxide nanocomposites for wastewater treatment; futuristic smart magnetic oxides as an elixir to global water scarcity is expounded. Desirable adsorption parameters and properties of magnetic oxides nanocomposites are explored while considering their fate in biological and environmental media.
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2

Hernández-Velasco, J., R. Sáez-Puche, J. Rodríguez-Carvajal, E. García-Matres, and J. L. Martínez. "Magnetic properties of novel R2BaCoO5 oxides (R = Pr, Nd, Ho)." Journal of Alloys and Compounds 207-208 (June 1994): 257–62. http://dx.doi.org/10.1016/0925-8388(94)90216-x.

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3

Yamamoto, Tatsuhiro, Kenji Kamishima, Koichi Kakizaki, and Nobuyuki Hiratsuka. "Preparation of novel potassium, lanthanum-iron oxides and their magnetic properties." Transactions of the Materials Research Society of Japan 37, no. 2 (2012): 271–74. http://dx.doi.org/10.14723/tmrsj.37.271.

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4

Long, Nguyet Viet. "INVESTIGATION OF SURFACES OF NOVEL IRON OXIDES WITH GRAIN AND GRAIN BOUNDARY." Vietnam Journal of Science and Technology 56, no. 1A (May 4, 2018): 226. http://dx.doi.org/10.15625/2525-2518/56/1a/12527.

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Hierarchical nano/microscale α-Fe2O3 iron oxide particle system was prepared by an improved and modified polyol method with the use of NaBH4 agent with high heat treatment at 900 °C in air. Here, α-Fe2O3 iron oxide particles with different shapes were analyzed. The morphologies of the surfaces of α-Fe2O3 iron oxide particles show the oxide structures with the different nano/microscale ranges of grain sizes. In this research, we have found that grain and grain boundary growth limits can be determined in α-Fe2O3 iron oxide structure. This leads to the possibility of producing new iron oxide structures with distribution of desirable size grain and grain boundary. With α-Fe2O3 structure obtained, the magnetic properties of the α-Fe2O3 iron oxide system are different from those of previously reported studies. in national and international studies.Keywords: Iron iron oxides, α-Fe2O3, chemical polyol methods, heat treatment.
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5

Venkatesan, T., D. C. Kundaliya, T. Wu, and S. B. Ogale. "Novel approaches to field modulation of electronic and magnetic properties of oxides." Philosophical Magazine Letters 87, no. 3-4 (March 2007): 279–92. http://dx.doi.org/10.1080/09500830701250314.

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6

Du, Yongping, and Xiangang Wan. "The novel electronic and magnetic properties in 5d transition metal oxides system." Computational Materials Science 112 (February 2016): 416–27. http://dx.doi.org/10.1016/j.commatsci.2015.09.036.

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7

HERNANDEZ-VELASCO, J., R. SAEZ-PUCHE, J. RODRIGUEZ-CARVAJAL, E. GARCIA-MATRES, and J. L. MARTINEZ. "ChemInform Abstract: Magnetic Properties of Novel Ln2BaCoO5 Oxides (Ln: Pr, Nd, Ho)." ChemInform 25, no. 42 (August 18, 2010): no. http://dx.doi.org/10.1002/chin.199442018.

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Oprea, Madalina, and Denis Mihaela Panaitescu. "Nanocellulose Hybrids with Metal Oxides Nanoparticles for Biomedical Applications." Molecules 25, no. 18 (September 4, 2020): 4045. http://dx.doi.org/10.3390/molecules25184045.

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Cellulose is one of the most affordable, sustainable and renewable resources, and has attracted much attention especially in the form of nanocellulose. Bacterial cellulose, cellulose nanocrystals or nanofibers may serve as a polymer support to enhance the effectiveness of metal nanoparticles. The resultant hybrids are valuable materials for biomedical applications due to the novel optical, electronic, magnetic and antibacterial properties. In the present review, the preparation methods, properties and application of nanocellulose hybrids with different metal oxides nanoparticles such as zinc oxide, titanium dioxide, copper oxide, magnesium oxide or magnetite are thoroughly discussed. Nanocellulose-metal oxides antibacterial formulations are preferred to antibiotics due to the lack of microbial resistance, which is the main cause for the antibiotics failure to cure infections. Metal oxide nanoparticles may be separately synthesized and added to nanocellulose (ex situ processes) or they can be synthesized using nanocellulose as a template (in situ processes). In the latter case, the precursor is trapped inside the nanocellulose network and then reduced to the metal oxide. The influence of the synthesis methods and conditions on the thermal and mechanical properties, along with the bactericidal and cytotoxicity responses of nanocellulose-metal oxides hybrids were mainly analyzed in this review. The current status of research in the field and future perspectives were also signaled.
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9

Magro, Massimiliano, Davide Baratella, Emanuela Bonaiuto, Jessica de A. Roger, and Fabio Vianello. "New Perspectives on Biomedical Applications of Iron Oxide Nanoparticles." Current Medicinal Chemistry 25, no. 4 (February 12, 2018): 540–55. http://dx.doi.org/10.2174/0929867324666170616102922.

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Iron oxide nanomaterials are considered promising tools for improved therapeutic efficacy and diagnostic applications in biomedicine. Accordingly, engineered iron oxide nanomaterials are increasingly proposed in biomedicine, and the interdisciplinary researches involving physics, chemistry, biology (nanotechnology) and medicine have led to exciting developments in the last decades. The progresses of the development of magnetic nanoparticles with tailored physico-chemical and surface properties produced a variety of clinically relevant applications, spanning from magnetic resonance imaging (MRI), drug delivery, magnetic hyperthermia, to in vitro diagnostics. Notwithstanding the wellknown conventional synthetic procedures and their wide use, along with recent advances in the synthetic methods open the door to new generations of naked iron oxide nanoparticles possessing peculiar surface chemistries, suitable for other competitive biomedical applications. New abilities to rationally manipulate iron oxides and their physical, chemical, and biological properties, allow the emersion of additional possibilities for designing novel nanomaterials for theranostic applications.
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10

Lorenz, Michael. "Pulsed laser deposition of functional oxides - towards a transparent electronics." Acta Crystallographica Section A Foundations and Advances 70, a1 (August 5, 2014): C1412. http://dx.doi.org/10.1107/s2053273314085878.

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Metal oxides, in particular with transition metals, show strong electronic correlations which determine a huge variety of electronic properties, together with other functionalities. For example, ZnO and Ga2O3 as wide-bandgap semiconductors have a high application potential as transparent functional layers in future oxide electronics [1-2]. Other oxides of current interest are ferrimagnetic spinels of the type MFe2O4 (M=Zn,Co,Ni), see K. Brachwitz et al. Appl. Phys. Lett. 102, 172104 (2013), or highly correlated iridate films, see M. Jenderka et al. Phys. Rev. B 88, 045111 (2013). Furthermore, combinations of ferroelectric and magnetic oxides in multiferroic composites and multilayers show promising magnetoelectric coupling. For the exploratory growth of the above mentioned novel oxides into nm-thin films, pulsed laser deposition (PLD) appears as the method of choice because of its extremely high flexibility in terms of material and growth conditions, high growth rate and excellent structural properties [3]. This talk highlights recent developments of new functional oxides using unique large-area PLD processes running for more than two decades in the lab of the author [3].
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Дисертації з теми "Novel Oxides - Magnetic Properties"

1

Chung, Emma Ming Lin. "Novel magnetic properties of d-electron single crystal oxides." Thesis, University of Warwick, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269072.

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2

Sabo, Daniel E. "Novel synthesis of metal oxide nanoparticles via the aminolytic method and the investigation of their magnetic properties." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/50122.

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Metal oxide nanoparticles, both magnetic and nonmagnetic, have a multitude of applications in gas sensors, catalysts and catalyst supports, airborne trapping agents, biomedicines and drug delivery systems, fuel cells, laser diodes, and magnetic microwaves. Over the past decade, an inexpensive, simple, recyclable, and environmentally friendly large, scale synthesis method for the synthesis of these metal oxide nanoparticles has been sought. Many of the current techniques in use today, while good on the small, laboratory bench scale, suffer from drawbacks that make them unsuitable for the industrial scale. The aminolytic method, developed by Dr. Man Han while working for Dr. Zhang, fits industrial scale-up requirements. The aminolytic method involves a reaction between metal carboxylate(s) and oleylamine in a non-coordinating solvent. This system was shown to produce a range of spinel ferrites. Dr. Lisa Vaughan showed that this method can be recycled multiple times without degrading the quality of the produced nanoparticles. The purpose of this thesis is to test the versatility of the aminolytic method in the production of a wide range of metal oxides as well as various core/shell systems. Chapter 2 explores the effect of precursor carboxylates chain length on the aminolytic synthesis of cobalt ferrite, and manganese ferrite nanoparticles. In Chapter 3, a series of CuxMn1-xFe₂O₄, (x ranges from 0.0 to 0.2), nanoparticles were synthesized via the aminolytic method. This series allows for the investigation of the effects of orbital Jahn-Teller distortion as well as orbital angular momentum on the magnetic properties of this ferrite. The quantum couplings of magnetic ions in spinel ferrites govern their magnetic properties and responses. An understanding of the couplings between these metal ions allows for tailoring magnetic properties to obtain the desired response needed for various applications. Chapter 4 investigates the synthesis of MnO and Mn₃O₄ nanoparticles in pure single phase with high monodispersity. To the best of our knowledge, the range of sizes produced for MnO and Mn₃O₄ is the most extensive, and therefore a magnetic study of these systems shows some intriguing size dependent properties. The final part of this chapter investigates the applicability of the aminolytic method for building a MnO shell on a CoFe₂O₄ core. Chapter 5 explores the synthesis of another metal oxide, ZrO₂ in both the cubic and monoclinic phases with no impurities. The use of the aminolytic method here removes the need for dangerous/expensive precursors or equipment and eliminates the need for extensive high temperature heat treatments that destroy monodispersity which is required for most techniques. The creation of a core/shell system between CoFe₂O₄ and ZrO₂ using the aminolytic method was also tested. This core/shell system adds magnetic manipulation which is especially useful for the recovery of zirconia based photocatalyst. Chapter 6 studies the application of the aminolytic method in the synthesis of yttrium iron garnet (YIG) and yttrium iron perovskite (YIP) nanoparticles. Current synthesis techniques used to produce YIG and YIP nanoparticles often requires high temperatures, sensitive to contamination, which could be eliminated through the use of our method
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3

Nguyen, Phuong-Hieu T. "Design, synthesis, crystal structure and magnetic properties of novel osmium-based oxides in ordered rock salt structure type." Thesis, California State University, Long Beach, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1601918.

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AFM materials with triangular cationic sublattices give rise to geometric magnetic frustration. The goal of this project is to study frustrated systems by designed and synthesis of more frustrated systems. For this purpose, the 5d system of osmium transition metal oxide was chosen. The osmium-based compounds are then successfully synthesized using the conventional solid state method. The crystal structures are then characterized by different techniques such as X-ray diffraction and neutron diffraction. To determine the ordering of the crystal systems, magnetic susceptibility and heat capacity measurements are carried out. By employing the spin dimer analysis, magnetic exchange interactions are calculated. These novel osmium-based ordered rock salt structure type systems are then being compared to similar crystal systems in the text.

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4

Alqahtani, Mohammed. "Magnetic and magneto-optical properties of doped oxides." Thesis, University of Sheffield, 2012. http://etheses.whiterose.ac.uk/3699/.

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This thesis describes the growth, structural characterisation, magnetic and magneto-optics properties of lanthanum strontium manganite (LSMO), GdMnO3 and transition metal (TM)-doped In2O3 thin films grown under different conditions. The SrTiO3 has been chosen as a substrate because its structure is suitable to grow epitaxial LSMO and GdMnO3 films. However, the absorption of SrTiO3 above its band gap at about 3.26 eV is actually a limitation in this study. The LSMO films with 30% Sr, grown on both SrTiO3 and sapphire substrates, exhibit a high Curie temperature (Tc) of 340 K. The magnetic circular dichroism (MCD) intensity follows the magnetisation for LSMO on sapphire; however, the measurements on SrTiO3 were dominated by the birefringence and magneto-optical properties of the substrate. In the GdMnO3 thin films, there are two well-known features in the optical spectrum; the charge transfer transition between Mn d states at 2 eV and the band edge transition from the oxygen p band to d states at about 3 eV; these are observed in the MCD. This has been measured at remanence as well as in a magnetic field. The optical absorption at 3 eV is much stronger than at 2 eV, however, the MCD is considerably stronger at 2 eV. The MCD at 2 eV correlates well with the Mn spin ordering and it is very notable that the same structure appears in this spectrum, as is seen in LaMnO3. The results of the investigations of Co and Fe-doped In2O3 thin films show that TM ions in the films are TM2+ and substituted for In3+. The room temperature ferromagnetism observed in TM-doped In2O3 is due to the polarised electrons in localised donor states associated with oxygen vacancies. The formation of Fe3O4 nanoparticles in some Fe-doped films is due the fact that TM-doped In2O3 thin films are extremely sensitive to the growth method and processing condition. However, the origin of the magnetisation in these films is due to both the Fe-doped host matrix and also to the nanoparticles of Fe3O4
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5

Akamatsu, Hirofumi. "Magnetic Properties of Amorphous Oxides and Related Materials." 京都大学 (Kyoto University), 2009. http://hdl.handle.net/2433/77993.

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Zong, Yanhua. "Magnetic and magnetodielectric properties of Eu2+-containing oxides." 京都大学 (Kyoto University), 2010. http://hdl.handle.net/2433/126809.

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7

Harrison, W. T. A. "Structural and magnetic properties of some mixed metal oxides." Thesis, University of Oxford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379947.

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8

Hill, Adrian H. "Magnetic properties of mesoporous and nano-particulate metal oxides." Thesis, University of Edinburgh, 2009. http://hdl.handle.net/1842/3531.

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The magnetic properties of the first row transition metal oxides are wide and varied and have been studied extensively since the 1930’s. Observations that the magnetic properties of these material types change with the dimension of the sample have stimulated many theoretical and experimental studies of the systems involved. As sample sizes decrease towards the nanoscale long range crystallographic order is no longer possible. However, the application of mesoporous silica samples as hard exo-templates to direct the formation of mesoporous metal oxides has provided a new opportunity to explore the influence of scale of crystallographic order further. These types of samples have pore systems running through the material on the mesoscale (diameter between 2nm to 50nm) with pore walls truly in the nanoscale region (7nm to 9nm thick) crystallographically ordered over large scale distances. The work presented in this thesis presents magnetic and crystallographic studies of a variety of the first row transition metal oxides from chromium to nickel in three dimensional mesoporous forms predominantly using SQUID magnetometry and neutron powder diffraction. Rietveld refinements of diffraction data from hematite and eskolaite (®-Fe2O3 and Cr2O3) show that the samples have space groups identical to their bulk counterparts, however slight differences in lattice parameters are observed. Refinement of magnetic properties has also been performed and compared to magnetic property measurements. Of particular interest are results from a mesoporous hematite which show suppression of a well defined first-order magnetic phase transition (the Morin transition). This suppression has been studied extensively with neutron powder diffraction and preliminary inelastic neutron spectroscopic measurements. Comparisons with hematite nanoparticles which also show the suppression of the Morin transition can be drawn. Parametric neutron powder diffraction studies on Co3O4 and NiO samples shows that the Néel ordering temperatures are lowered as the mesoporous structure is imposed. This too was observed in eskolaite. Other studies have been carried out on mesoporous alpha-MnO2 (magnetometry) and nanoscale Li1+xMn2–xO4 (X-ray photo electron spectroscopy) with comparisons to their bulk counterparts and finally nanoparticulate hausmannite Mn3O4 (magnetometry and muon spin relaxation) which exhibits spin-glass type behaviour.
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9

Knee, Christopher Sebastian. "Synthesis, structure and magnetic properties of complex metal oxides." Thesis, University of Southampton, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299519.

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Gallacher, Derek Graham. "Nature and properties of some magnetic mixed metal oxides." Thesis, Glasgow Caledonian University, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.371402.

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Книги з теми "Novel Oxides - Magnetic Properties"

1

Magnetic oxides. New York: Springer, 2009.

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2

Kawazoe, Yoshiyuki, Takeshi Kanomata, and Ryunosuke Note. High Pressure Materials Properties: Magnetic Properties of Oxides Under Pressure. Berlin, Heidelberg: Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/978-3-662-64593-2.

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3

Bagin, V. I. Magnetizm [alpha]-okislov i gidrookislov zheleza. Moskva: Institut fiziki Zemli AN SSSR, 1988.

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4

Ivan, Nedkov, Ausloos M. 1943-, and NATO Advanced Research Workshop on Ferrimagnetic Nano-crystalline and Thin Film Magnetooptical and Microwave Materials (1998 : Sozopol, Bulgaria), eds. Nano-crystalline and thin film mangnetic oxides. Dordrecht: Kluwer Academic Publishers, 1999.

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5

Das, Tanmoy. Magnetic mechanism of superconductivity in copper-oxide. Hauppauge, N.Y: Nova Science Publishers, 2011.

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6

F, Hundley Michael, ed. Science and technology of magnetic oxides: Symposium held December 1-4, 1997, Boston, Massachusetts, U.S.A. Warrendale, Pa: Materials Research Society, 1998.

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7

Magnetic properties of antiferromagnetic oxide materials: Surfaces, interfaces, and thin films. Weinheim: Wiley-VCH, 2010.

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8

N, Goshchit͡s︡kiĭ B., Gelʹd P. V, and Institut fiziki metallov (Akademii͡a︡ nauk SSSR), eds. Struktura i magnitnye svoĭstva okisnykh magnetikov, obluchennykh bystrymi neĭtronami. Moskva: "Nauka", 1986.

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9

Rader, Oliver. Novel effects observed in ultrathin magnetic films: Magnetic quantum-well, interface, and correlation-induced states. Berlin: Wissenschaft & Technik Verlag, 1995.

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10

International Symposium on Novel Materials Processing by Advanced Electromagnetic Energy Sources (2004 Osaka, Japan). Novel materials processing by advanced electromagnetic energy sources (MAPEES'04): Proceedings of the International Symposium on Novel Materials Processing by Advanced Electromagnetic Energy Sources : March 19-22, 2004, Osaka, Japan. Edited by Miyake S. Amsterdam: Elsevier, 2005.

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Частини книг з теми "Novel Oxides - Magnetic Properties"

1

Dionne, Gerald F. "Electromagnetic Properties." In Magnetic Oxides, 273–342. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/978-1-4419-0054-8_6.

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2

Dionne, Gerald F. "Magneto-Optical Properties." In Magnetic Oxides, 343–84. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/978-1-4419-0054-8_7.

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Dionne, Gerald F. "Spin Transport Properties." In Magnetic Oxides, 385–459. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/978-1-4419-0054-8_8.

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4

Dionne, Gerald F. "Anisotropy and Magnetoelastic Properties." In Magnetic Oxides, 201–71. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/978-1-4419-0054-8_5.

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5

da Silva, E. C. F. "Diluted magnetic oxides: magnetic properties." In New Data and Updates for IV-IV, III-V, II-VI and I-VII Compounds, their Mixed Crystals and Diluted Magnetic Semiconductors, 544. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-14148-5_297.

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6

Lu, Jiwei, Kevin G. West, and Stuart A. Wolf. "Novel Magnetic Oxide Thin Films." In Thin Film Metal-Oxides, 95–129. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/978-1-4419-0664-9_3.

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7

Moodenbaugh, A. R., J. J. Hurst, T. Asano, R. L. Sabatini, and M. Suenaga. "Superconducting Properties and Structural Characterization of High Tc Oxides." In Novel Superconductivity, 767–69. Boston, MA: Springer US, 1987. http://dx.doi.org/10.1007/978-1-4613-1937-5_95.

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8

Pardasani, R. T., and P. Pardasani. "Magnetic properties of cerium uranium oxides." In Magnetic Properties of Paramagnetic Compounds, 5140. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-23675-4_4698.

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9

Fecioru-Morariu, Marian, Ulrich Nowak, and Gernot Güntherodt. "Exchange Bias by Antiferromagnetic Oxides." In Magnetic Properties of Antiferromagnetic Oxide Materials, 143–90. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2010. http://dx.doi.org/10.1002/9783527630370.ch5.

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Zhang, X. X., A. Roig, J. M. Hernàndez, E. Molins, J. Tejada, and R. F. Ziolo. "Magnetic Properties of Nanocrystalline CoFe2O4 Particles." In Magnetic Hysteresis in Novel Magnetic Materials, 383–87. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5478-9_40.

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Тези доповідей конференцій з теми "Novel Oxides - Magnetic Properties"

1

Kumar, D., S. Yarmolenko, J. Sankar, J. Narayan, A. Tiwari, H. Zhou, C. Jin, A. V. Kvit, S. J. Pennycook, and A. Lupini. "Processing and Properties of Nanostructured Magnetic Materials." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-39364.

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We report here a novel thin film processing method based upon pulsed laser deposition to process nanocrystalline materials with accurate size and interface control with improved mechanical and magnetic properties. Using this method, single domain nanocrystalline Fe and Ni particles in 5–10 nm size range embedded in amorphous alumina as well as crystalline TiN have been produced. By controlling the size distribution in confined layers, it was possible to tune the magnetic properties from superparamagnetic to ferromagnetic behavior. Magnetic hysteresis characteristics below the blocking temperature are consistent with single-domain behavior. The paper also presents our results from investigations in which scanning transmission electron microscopy with atomic number contrast (STEM-Z) and energy loss spectroscopy (EELS) were used to understand the atomic structure of Ni nanoparticles and interface between the nanoparticles and the surrounding matrices. It was interesting to learn from EELS measurements at interfaces of individual grains that Ni in alumina matrix does not from an ionic bond indicating the absence of metal-oxygen bond at the interface. The absence of metal-oxygen bond, in turn, suggests the absence of any dead layer on Ni nanoparticles even in an oxide matrix.
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2

Barman, Anwesa, and Manas Das. "Exploration of Finishing Capability of Developed Polishing Tool in Hybrid Magnetic Field Assisted Finishing Process to Finish Complex Freeform Surfaces of Femoral Component of Prosthetic Knee Joint." In ASME 2020 15th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/msec2020-8271.

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Abstract Magnetic field-assisted finishing process is a hybrid nanofinishing process that combines the advantages of both magnetorheological finishing process and chemical mechanical polishing process. This process uses magnetorheological fluid combined with chemicals as the polishing medium. The developed novel tool is made of mu-metal which encloses a permanent magnet. The femoral component of the prosthetic knee joint made of titanium alloy is used as the workpiece material in the present study. The surface finish requirement of the femoral knee joint is at the nanometer level. Finishing of the femoral component of the knee joint is a difficult task due to its complex surface conditions. The best final surface roughness of 0.02 μm is obtained after finishing of the knee joint. Also, the femoral knee joint should be hydrophilic in nature. Surface wettability test is conducted using the goniometer to prove the hydrophilicity nature of the finished surface. The formation of the oxide layer is observed on the finished surface. The oxide layer increases the biocompatibility of the implant. The present study proves the capability of the novel tool to provide the required surface properties of the femoral knee implant. Hence, the magnetic field-assisted finishing process can be used to finish the complex freeform surface of the femoral knee implant.
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3

Rümmeli, M. "Metal Oxides and Low Temperature SWCNT Synthesis via Laser Evaporation." In ELECTRONIC PROPERTIES OF NOVEL NANOSTRUCTURES: XIX International Winterschool/Euroconference on Electronic Properties of Novel Materials. AIP, 2005. http://dx.doi.org/10.1063/1.2103825.

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4

Chen, Kok Hao, and Jong Hyun Choi. "DNA Oligonucleotide-Templated Nanocrystals: Synthesis and Novel Label-Free Protein Detection." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-11958.

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Semiconductor and magnetic nanoparticles hold unique optical and magnetic properties, and great promise for bio-imaging and therapeutic applications. As part of their stable synthesis, the nanocrystal surfaces are usually capped by long chain organic moieties such as trioctylphosphine oxide. This capping serves two purposes: it saturates dangling bonds at the exposed crystalline lattice, and it prevents irreversible aggregation by stabilizing the colloid through entropic repulsion. These nanocrystals can be rendered water-soluble by either ligand exchange or overcoating, which hampers their widespread use in biological imaging and biomedical therapeutics. Here, we report a novel scheme of synthesizing fluorescent PbS and magnetic Fe3O4 nanoparticles using DNA oligonucleotides. Our method of PbS synthesis includes addition of Na2S to the mixture solution of DNA sequence and Pb acetate (at a fixed molar ratio of DNA/S2−/Pb2+ of 1:2:4) in a standard TAE buffer at room temperature in the open air. In the case of Fe3O4 particle synthesis, ferric and ferrous chloride were mixed with DNA in DI water at a molar ratio of DNA/Fe2+/Fe3+ = 1:4:8 and the particles were formed via reductive precipitation, induced by increasing pH to ∼11 with addition of ammonium hydroxide. These nanocrystals are highly stable and water-soluble immediately after the synthesis, due to DNA termination. We examined the surface chemistry between oligonucleotides and nanocrystals using FTIR spectroscopy, and found that the different chemical moieties of nucleobases passivate the particle surface. Strong coordination of primary amine and carbonyl groups provides the chemical and colloidal stabilities, leading to high particle yields (Figure 1). The resulting PbS nanocrystals have a distribution of 3–6 nm in diameter, while a broader size distribution is observed with Fe3O4 nanoparticles as shown in Figure 1b and c, respectively. A similar observation was reported with the pH change-induced Fe3O4 particles of a bimodal size distribution where superparamagnetic and ferrimagnetic magnetites co-exist. In spite of the differences, FTIR measurements suggest that the chemical nature of the oligonucleotide stabilization in this case is identical to the PbS system. As a particular application, we demonstrate that aptamer-capped PbS QD can detect a target protein based on selective charge transfer, since the oligonucleotide-templated synthesis can also serve the additional purpose of providing selective binding to a molecular target. Here, we use thrombin and a thrombin-binding aptamer as a model system. These QD have diameters of 3∼6 nm and fluoresce around 1050 nm. We find that a DNA aptamer can passivate near IR fluorescent PbS nanocrystals, rendering them water-soluble and stable against aggregation, and retain the secondary conformation needed to selectively bind to its target, thrombin, as shown in Figure 2. Importantly, we find that when the aptamer-functionalized nanoparticles binds to its target (only the target), there is a highly systematic and selective quenching of the PL, even in high concentrations of interfering proteins as shown in Figure 3a and b. Thrombin is detected within one minute with a detection limit of ∼1 nM. This PL quenching is attributed to charge transfer from functional groups on the protein to the nanocrystals. A charge transfer can suppress optical transition mechanisms as we observe a significant decrease in QD absorption with target addition (Figure 3c). Here, we rule out other possibilities including Forster resonance energy transfer (FRET) and particle aggregation, because thrombin absorb only in the UV, and we did not observe any significant change in the diffusion coefficient of the particles with the target analyte, respectively. The charge transfer-induced photobleaching of QD and carbon nanotubes was observed with amine groups, Ru-based complexes, and azobenzene compounds. This selective detection of an unlabeled protein is distinct from previously reported schemes utilizing electrochemistry, absorption, and FRET. In this scheme, the target detection by a unique, direct PL transduction is observed even in the presence of high background concentrations of interfering negatively or positively charged proteins. This mechanism is the first to selectively modulate the QD PL directly, enabling new types of label free assays and detection schemes. This direct optical transduction is possible due to oligonucleotidetemplated surface passivation and molecular recognition. This chemistry may lead to more nanoparticle-based optical and magnetic probes that can be activated in a highly chemoselective manner.
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5

Yamaguchi, K., T. Fujii, S. Kuranouchi, Y. Yamanobe, and A. Ueno. "Magnetic properties of iron-boron-oxides and iron-phospher-oxides glasses prepared by sol-gel method." In International Magnetics Conference. IEEE, 1989. http://dx.doi.org/10.1109/intmag.1989.689957.

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6

Sang Heon Lee and Yong Choi. "Magnetic properties of Ag doped BiSrCaCuO oxides using thermal pylolysis method." In 2006 IEEE Nanotechnology Materials and Devices Conference. IEEE, 2006. http://dx.doi.org/10.1109/nmdc.2006.4388916.

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7

Sang Heon Lee and Yong Choi. "Magnetic properties of Ag doped BiSrCaCuO oxides using thermal pylolysis method." In 2006 IEEE Nanotechnology Materials and Devices Conference. IEEE, 2006. http://dx.doi.org/10.1109/nmdc.2006.4388963.

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8

Acharya, Prashant, and Harshida Parmar. "Size dependent mechanical and magnetic properties of Zn substituted cobalt ferrite below A-site percolation threshold." In FUNCTIONAL OXIDES AND NANOMATERIALS: Proceedings of the International Conference on Functional Oxides and Nanomaterials. Author(s), 2017. http://dx.doi.org/10.1063/1.4982156.

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9

Blinc, R. "Magnetic Properties of TDAE-C70." In ELECTRONIC PROPERTIES OF NOVEL NANOSTRUCTURES: XIX International Winterschool/Euroconference on Electronic Properties of Novel Materials. AIP, 2005. http://dx.doi.org/10.1063/1.2103814.

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10

Bucci, C. "INVESTIGATION OF MAGNETIC PROPERTIES IN HIGH Tc OXIDES BY MUON SPIN ROTATION." In Lecture Notes of the ICTP Spring College in Condensed Matter on “Superconductivity”. WORLD SCIENTIFIC, 1995. http://dx.doi.org/10.1142/9789814503891_0008.

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Звіти організацій з теми "Novel Oxides - Magnetic Properties"

1

Das, Supriyo. Synthesis and structural, magnetic, thermal, and transport properties of several transition metal oxides and aresnides. Office of Scientific and Technical Information (OSTI), January 2010. http://dx.doi.org/10.2172/985308.

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2

Voyles, Paul M., and Y. Austin Chang. Final Report: Stability and Novel Properties of Magnetic Materials and Ferromagnet / Insulator Interfaces. Office of Scientific and Technical Information (OSTI), July 2013. http://dx.doi.org/10.2172/1088313.

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3

Hill, Julienne Marie. Doping Experiments on Low-Dimensional Oxides and a Search for Unusual Magnetic Properties of MgAlB14. Office of Scientific and Technical Information (OSTI), January 2002. http://dx.doi.org/10.2172/806588.

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