The crystallized Fe BN O films exhibit good soft magnetic properties with high ϱ and low ... (1994) 1025-1029 1025 Soft magnetic properties of fine crystalline Fe-BN and Fe-BN-O films S. , S. Ohnuma and F. Matsumoto Amorphous Magnetic Device Laboratory, Sendai 989-32 (Japan) H. Fujimori and T. Masumoto Institute for Material Research ...
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Fig. 9. Variation of i Hc of the sintered NdFeB magnets obtained by different processes in this study. - "The Role of Dehydrogenation Conditions on Sinterability and Magnetic Properties of Fine NdFeB Powders Consolidated With Hydrogen-Containing Sintering"
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Therefore, there are more magnetic phases content per unit volume of magnetic powder core, and then optimize the magnetic properties of magnetic powder core. The addition of fine powder method was used to improve the relative density and then optimize the magnetic properties of magnetic powder cores [19], [20], [22], [23].
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Size-dependent magnetic properties of MnFe2O4 fine particles synthesized by coprecipitation Phys Rev B Condens Matter. 1996 Oct 1;54(13):9288-9296. doi: 10.1103/physrevb.54.9288. Authors JP Chen, CM Sorensen, KJ Klabunde, GC Hadjipanayis, E Devlin, A Kostikas. PMID: 9984662 ...
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Cerium dioxide, which is diamagnetic in its bulk crystalline fluorite form, exhibits ferromagnetism when prepared as a nanopowder.This characteristic has recently been ascribed to localized electron spin moments formed at oxygen vacancies near the nanoparticle surfaces. In the present study, a number of structure-sensitive and magnetic methods were applied to CeO …
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Manganese ferrite, MnFe 2 O 4, fine particles in the size range 5–15 nm have been prepared by an aqueous phase coprecipitation method. The freshly prepared particles are in a …
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Manganese ferrite, ${mat{MnFe}}_{2}$${mat{O}}_{4}$, fine particles in the size range 5--15 nm have been prepared by an aqueous phase coprecipitation method. The freshly prepared particles are in a metastable state with regard to the cation distribution between the A and B sites of the spinel lattice. Thermomagnetic, differential scanning calorimetry and …
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Fine particles offer an attractive avenue for the study of the magnetic properties of surfaces. The use of small particles instead of thin films has some advantages. Although …
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Fine particles of MnBi were prepared by the hydrogen plasma metal reaction method and their magnetic properties were investigated. The particle size of the as-prepared MnBi particles was 70950nm with a median diameter of 269nm. Heat treatment and ball milling with a dispersant improved the magnetic properties of the particles.
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M-type Sr-hexaferrites fine particles have been prepared by mechanical alloying. The influences of milling conditions on magnetic properties of SrFe 12 O 19 compounds have been systematically investigated. It can be found that annealing treatment at low temperature can play similar role in structural transformation as compared with long time milling process.
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The magnetic properties of nano-sized Cu 2 O with and without magnetic doping have also received renewed attention due to the fundamental interest for the study of spin-polarized transport ...
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The development of novel soft magnetic composites (SMCs) is driven by the demand for lightweight and highly stable electronic components. In this work, the influence of fine powder content on the ...
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Heat conditions for synthesis of Fe16N2 tine particles and the resulting magnetic properties were investigated. Commercial ultra fine γ - Fe2O3 particles were first reduced under hydrogen gas at ...
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Low-temperature grain-oriented (LTGO) silicon steel fabricated by low slab reheating temperature method is an ideal electromagnetic material due to its high magnetic induction and low core loss along the rolling direction, and in order to obtain excellent magnetic properties, a sharp Goss texture ({1 1 0} 〈0 0 1〉 ) should be achieved by secondary …
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The saturation magnetization and permeability primarily depend on various factors such as the ferromagnetic phase content, crystal structure, and stress state [7], [8], [9].To obtain high saturation magnetization, permeability and low loss in SMCs, several methods have been proposed such as (1) doping fine powders to enhance the coupling effect between matrix …
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Thermomagnetic, differential scanning calorimetry and Moss spectroscopy show that heat treatment under inert gas to 670 K irreversibly changes the cation distribution to a stable state and the Curie temperature is modified in association with these changes. Manganese ferrite, ${mat{MnFe}}_{2}$${mat{O}}_{4}$, fine particles in the size range …
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Magnetic properties of fine-grained minerals E. Murad 339 Small particles in catalysts, catalysis and surface chemistry J.W. Niemantsverdriet 351 Surface properties of heterogeneous magnetic particles by physisorption P.L. Cavallotti, L. Nobili, G. Zangari, A. Adamoli and
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Therefore, we wonder whether it is possible to achieve good mechanical and magnetic properties of the FeCoNiAl 0.25 Mn 0.25 alloy through fine control of the microstructure. The objective of the current work is to deliberately explore the influence of annealing treatment on phase composition, microstructure and properties (mechanical and ...
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Ultrafine particles of cobalt were prepared under argon by reduction of cobalt halide solutions in diglyme ether with metallic lithium and a naphthalene catalyst. The fine particles …
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Fine particles of lithium ferrite were synthesized by the sol-gel method. By subsequent heat treatment at different temperatures, lithium ferrites of different grain sizes were prepared. A structural characterization of all the samples was conducted by the x-ray diffraction technique. A grain size of around 12 nm was observed for Li0.5Fe2.5O4 obtained through the sol-gel …
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We investigate the particle size dependence of magnetic properties of ZnFe 2 O 4 fine particles. The fine particles with different particle sizes were obtained by heating the coprecipitated powder. The magnetization slowly increases with decreasing the particle size, and drastically in the particles with diameter < 30 nm The size dependent magnetization shows …
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In this paper, FeSiAl soft magnetic composite materials (SMCs) with excellent comprehensive soft magnetic properties were prepared by adding an appropriate amount of …
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All aspects of fine magnetic particles are covered in the 46 papers. The topics are remarkably interdisciplinary covering theory, materials preparation, structural characterization, …
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Abstract: The dependence of the dehydrogenation conditions on the sinterability and magnetic properties of fine neodymium-iron–boron (NdFeB) powders consolidated with hydrogen-containing sintering was investigated. The new process proposed in this study adopts jet milling (JM) powder refinement to enhance the coercivity. After JM, the average particle size was reduced to …
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By carefully fine-tuning the annealing conditions, we were able to systematically monitor the enhancement of perpendicular magnetic anisotropy while minimizing the formation of structural defects or alterations to the material's morphology. ... These magnetic properties could be particularly significant for various applications in magnetic ...
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Local structure and magnetic properties of CoMn2O4 nanoparticles prepared by co-precipitation method have been examined. X-ray diffraction pattern shows mixed phase of tetragonal and cubic phases at room temperature with crystallite size of 42 nm, while Fourier transform infrared spectrum shows bands corresponding to tetrahedral and octahedral sites of …
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Magnetic fine particles find a large number of applications, perhaps most notably as particulate recording media. In addition, the ideas of fine particle magnetism are applicable in a number of …
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All aspects of fine magnetic particles are covered in the 46 papers. The topics are remarkably interdisciplinary covering theory, materials preparation, structural characterization, optical and electrical properties, magnetic properties studied by different techniques and applications.
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The magnetic powder core with 20 wt% fine particles has the optimum comprehensive soft magnetic properties, it shows the effective permeability (µ) of 64, which is increased by 25%, saturation ...
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Ultrafine particles of cobalt were prepared under argon by reduction of cobalt halide solutions in diglyme ether with metallic lithium and a naphthalene catalyst. The fine particles had a particle diameter in the range 50–1200 A. The size was dependent on the reaction temperature. X‐ray diffraction showed crystalline particles of α‐Co and CoO. Because the ratio of the metal …
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High-flux ferronickel powder cores are widely used in high-frequency transformers and other fields due to their high saturation flux density and low core loss. In this paper, FeNi@Al2O3 composites with varying Al2O3 contents (0.0–5.0 wt.%) were prepared. Their microstructure, magnetic properties, and power losses were investigated in detail. SEM morphology indicates that …
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Magnetic properties of undoped Cu2O fine powders with magnetic impurities and/or cation vacancies Chinping Chen1a, Lin He1, Lin Lai1, Hua Zhang2, Jing Lu1, Lin Guo2b, and Yadong ... The magnetic properties of pure Cu2O are investigated with four powder samples synthesized by three different chemical methods. The experimental details for two of
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INTRINSIC PARTICLE PROPERTIES The magnetic behaviour of a fine particle system is to a large extent governed by the intrinsic properties of the particles. The most important property …
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