Results 321 to 330 of about 384,285 (385)
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Reviews of Modern Physics, 1953
A brief discussion is given of the meaning of initial permeability, the principles of its measurement, and the nature of "dimensional resonance." In considering magnetic spectra containing only a single resonance, typical data on sintered ferrites and on finely divided ferrite powders are reviewed, and some of the theoretical interpretations previously
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A brief discussion is given of the meaning of initial permeability, the principles of its measurement, and the nature of "dimensional resonance." In considering magnetic spectra containing only a single resonance, typical data on sintered ferrites and on finely divided ferrite powders are reviewed, and some of the theoretical interpretations previously
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Magnetic-field-free processed anisotropic ferrite magnets
IEEE Transactions on Magnetics, 1981Four different strontium ferrite powders were prepared and oriented with magnetic-field-free technique. Studies were made on the following two points by residual induction measurements parallel and perpendicular to the preferred direction; (1) the effect of the content of organic binder on the degree of orientation in a green compact, (2) the changes ...
K. Saito +3 more
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Recent Ferrite Magnet Developments
Journal of Applied Physics, 1966Currently used ferrite magnets (also called ceramic magnets) are modifications of the magnetoplumbites MO·6 Fe2O3 where M stands for Ba or Sr—with additions of other compounds, off-stoichiometric ratios, flexible binders, etc. The first commercial magnetoplumbite magnets were of the barium ferrite type, but the newer ones are modified strontium ...
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Magnetic Interactions Versus Magnetic Anisotropy in Spinel Ferrite Nanoparticles
IEEE Magnetics Letters, 2019We investigated the flexibility of high-temperature thermal decomposition synthesis to design magnetic nanoparticles (NPs) with engineered properties. We prepared spinel iron oxide particles with the desired composition (Fe3O4 and CoFe2O4) and a well-controlled average size (5−8 nm) by tuning the synthesis procedure.
Muscas G. +9 more
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Design of Multilayer Concentric Ferrite-Magnet Machines for a Traction Application
IEEE Transactions on Transportation Electrification, 2021Ehab Sayed +7 more
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Magnetic aftereffects in magnesium ferrites
IEEE Transactions on Magnetics, 2001We report a study of aftereffect processes in magnetite with magnesium substitutions. The study observed the processes by means of disaccommodation techniques. We have recorded the time evolution of the initial magnetic susceptibility after sample demagnetization of polycrystalline specimens with nominal composition Mg/sub x/Fe/sub 3-x/O/sub 4/, 0/spl ...
O. Alejos +6 more
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Barium ferrite permanent magnets
Soviet Powder Metallurgy and Metal Ceramics, 19641. We have selected and introduced the following optimum conditions for the preparation of isotropic barium ferrite magnets: a)Barium oxide content 15 ± 1%; b) kaolin content 1%; c) roasting of mixture of ferric oxide and barium salt at temperatures of 900–950‡ with five hours holding time; d) pressure during pressing 1.5–2 t/cm2; e) sintering of
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Magnetization in Nickel Ferrite-Aluminates and Nickel Ferrite-Gallates
Physical Review, 1953Trivalent aluminum and trivalent gallium have been substituted for trivalent iron in nickel ferrite NiO\ifmmode\cdot\else\textperiodcentered\fi{}${\mathrm{Fe}}_{2}$${\mathrm{O}}_{3}$ to give the systems $\mathrm{NiO}\ifmmode\cdot\else\textperiodcentered\fi{}{\mathrm{Fe}}_{2\ensuremath{-}t}{\mathrm{Al}}_{t}{\mathrm{O}}_{3}$ and $\mathrm{NiO}\ifmmode ...
Louis R. Maxwell, Stanley J. Pickart
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IEEE transactions on magnetics, 2018
A rotor structure of Permanent Magnet (PM)-assisted synchronous Reluctance Machine (PMa-synRM) with ferrite PM is presented in this paper, in which the irreversible demagnetization of PM and torque ripple are reduced. The bypass rib is proposed and added
Y. Kong, Mingyao Lin, Ming Yin, L. Hao
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A rotor structure of Permanent Magnet (PM)-assisted synchronous Reluctance Machine (PMa-synRM) with ferrite PM is presented in this paper, in which the irreversible demagnetization of PM and torque ripple are reduced. The bypass rib is proposed and added
Y. Kong, Mingyao Lin, Ming Yin, L. Hao
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Magnetic aftereffects in manganese ferrites
Physica Status Solidi (a), 1976The magnetic aftereffect in MnxFe3-x-ΔO4 is investigated as a function of the Mn concentration (0 < x < 1.0) and the cation vacancy concentration (10−4 < Δ < 5×10−2) in the temperature range between 80 and 530 K. Well defined relaxation processes are observed at 300 (III), 425 (II), and 530 K (I).
F. Walz, J. Rivas
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