Results 161 to 170 of about 13,587 (205)

Magnetic aftereffects in manganese ferrites

Physica Status Solidi (a), 1976
The 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).
José Rivas, F. Walz
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Hard Magnetic Ferrites

1991
Publisher Summary This chapter focuses on M-type ferrites, which with high coercivity are called hard ferrites. Ferrite magnets were first introduced commercially by Philips under the trade name Ferroxdure, the isotropic form being introduced in 1952 and the anisotropic form in 1954. The magnetoplumbite crystal structure is characterized by the space
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Magnetic Spectra of Manganese Ferrites

Physical Review, 1958
The complex initial permeability of a series of polycrystalline manganese-rich manganese ferrites (${\mathrm{Mn}}_{1+x}{\mathrm{Fe}}_{2\ensuremath{-}x}{\mathrm{O}}_{4}$) has been measured between 20 Mc/sec and 2000 Mc/sec. Three resonances are detected; the two lower-frequency resonances, which occur below 200 Mc/sec, are associated with domain wall ...
S. R. Pollack, C. J. Kriessman, S. E. Harrison   +2 more
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Magnetic excitations in dicalcium ferrite

Solid State Communications, 1992
Abstract Submillimeter spectra (10–100cm-1) were measured for the first time in the orthorhombic antiferromagnet dicalcium ferrite Ca2Fe2O5 in zero magnetic field. Two magnon modes have been observed by means of Fourier spectroscopy at temperatures 4.2–350K.
A.M. Balbashov, R. Geick, E.G. Rudashevsky, P. Marchukov, C. Brotzeller   +4 more
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Magnetic phases of bismuth ferrite

Journal of Magnetism and Magnetic Materials, 2009
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
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Magnetic sublattices in nickel ferrite

Journal of Magnetism and Magnetic Materials, 1987
Abstract A definition of the concept of “magnetic sublattice” is proposed by the following three steps, i.e.,i) the “site sublattice”, ii) the “cationic sublattice” and iii) the “magnetic sublattice”. The most important feature of this concept is the condition of long range order in the occupancy of the cation sites, including the direction of the ...
S. Aburto, Raul Valenzuela, Virginia Fuentes   +2 more
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Magnetic viscosity in Ba-ferrite

Journal of Magnetism and Magnetic Materials, 1991
Abstract Results are presented on magnetic viscosity measurements performed at room temperature on Ba-ferrite pressed powder samples of different particle sizes. Maximum values of viscosity coefficients ( S ) occur around coercive fields, except for a sample with an intrinsic coercive force of 4639 Oe, in which the maximum is at a much higher field ...
F. Carmona, Aurelio Martín Blanco, Carlos Alemany   +2 more
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Green's functions and magnetized ferrites

International Journal of Electronics, 1992
Magnetized ferrites play an important role in the field of microwaves as substrates in various electronic elements. The dyadic Green's functions method is used to solve the electromagnetic field problem for such anisotropic (magnetically gyrotropic) materials.
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Magnetic Dipole Effects in Ferrites

The Journal of Chemical Physics, 1957
This paper presents an analysis of the role which classical magnetic dipole-dipole interactions may play in the physical behavior of ferrites with particular attention to magnetic anisotropy. Included is an evaluation of these effects in magnetite and lithium ferrite where an ordered arrangement of dipoles can exist and a study and calculation of some ...
Daniel W. Healy, Richard A. Johnson
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The magnetic disaccommodation in aluminium ferrites

Journal of Magnetism and Magnetic Materials, 1999
Abstract The domain wall stabilization processes in aluminium substituted magnetite is investigated by means of disaccommodation techniques. The time evolution of the initial magnetic susceptibility after sample demagnetization is measured for polycrystalline specimens with nominal composition Al x Fe 3− x O 4 , 0⩽ x ⩽1, around room temperature ...
C. de Francisco, Carlos Torres, José María Muñoz, J. I. Iñiguez, Luis Torres, P. Hernández, Oscar Alejos   +6 more
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