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Magnetic Aftereffects in Zinc Ferrites
physica status solidi (a), 1997Magnetic after-effect (MAE) spectra on differently sintered zinc ferrites, Zn x Fe 3-z-Δ O 4 with 0.1 < x < 0.5 containing orthogonal vacancies (10 -5 < Δ < 10 -3 ) are investigated in the temperature range 4 K < T < 450 K using an LC-oscillator technique. The low-temperature MAE processes due to electron tunnelling (4 K< T < 35 K) and hopping (50 K <
F. Walz +3 more
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Radially oriented ferrite magnets
IEEE Transactions on Magnetics, 1979A new manufacturing method, magnetic-field-free-process, to obtain radially oriented ferrite magnets was developed, utilizing the shape anisotropy of the particles of strontium magnetoplumbite, with the following properties : Br = 365mT, bHc = 225kA/m, iHc = 240kA/m, (BH)max = 24kJ/m3, density = 4950 kg/m3, flexural strength = 167MPa.
H. Kobayashi +3 more
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Magnetic Aftereffects in Titanium Ferrites
physica status solidi (a), 1997Magnetic aftereffect (MAE) measurements in Ti x Fe 3-x-Δ O 4 with 0.01 ≤ x ≤ 0.4 (Δ 10 -4 ) are performed by means of an oscillator technique in the temperature range 4 K < T < 460 K. The specific electronic MAE processes below the Verwey temperature, i.e., tunnelling (4 K < T< 35 K) and long-range hopping (50 K < T< 125 K); are found to be severely ...
C. de Francisco +4 more
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Analysis of Measurements on Magnetic Ferrites
Proceedings of the IRE, 1953The unconventional behavior of permeability and core loss in the magnetic ferrites as compared to metals has led to a study of core-loss measurements. The relationships between the magnetic quality factor ?Q and the characteristics of coils and transformers are developed, and the advantages of ?Q as a parameter for the study and application of ferrites
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Magnetization in Ferrites: Saturation Magnetization of Ferrites with Spinel Structure [PDF]
Nature, 1950 openaire +2 more sources
THE MAGNETIC FIELDS OF A FERRITE ELLIPSOID
Canadian Journal of Physics, 1958Approximate expressions are found for the internal and the adjacent external magnetic fields of a small ferrite ellipsoid under plane wave excitation. Consideration is given to the variation of apparent susceptibility with the size of the ferrite.
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The magnetic anisotropy of manganate ferrites
Czechoslovak Journal of Physics, 1966The anisotropy constants K1 for systems MnxFe3−xO4, with 1≦x ≦1·8, are calculated on the basis of the one-ion model and it is shown that the anomalous temperature dependence of the constant K1 can be explained by the presence of Mn3+ ions in octahedral positions.
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Magnetic loss in soft ferrites
Journal of Applied Physics, 2007In order to understand the anomalous magnetic field dependence of the high frequency (200kHz–1.0MHz) losses, we consider the high field conductivity of the soft ferrites. We show that the high field conductivity is highly nonlinear. Separately, we show that this nonlinear behavior is due to tunneling between adjacent ferrite grains.
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Magnetic behaviour of some ferrites
Physica, 1953Synopsis From the course of the Curie temperature of a series of mixed crystals of nickel ferrite and nickel titanate (Fe 22a Ni 1+ a Ti a O 4 ) with 0 a a of titanium, by E. W. Gorter of this Laboratory, the distribution of the titanium amongst the tetrahedral ( A -) and octahedral ( B -) sites of the spinel is derived on the assumption that ...
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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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