Results 171 to 180 of about 12,293 (208)

Crystallography of the hexagonal ferrites.

Science (New York, N.Y.), 2010
The hexagonal ferrites form an unusual group of complex, ferrimagnetic oxides embodying some 60 known crystal structures. These include phases for which the structural unit cell is larger than that in any known inorganic materials. The various hexagonal ferrite modifications fall into two distinct structural series, each formed by the ordered ...
J A, Kohn, D W, Eckart, C F, Cook
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W-type hexagonal ferrites RxBa-xFe18O27

Journal of Magnetism and Magnetic Materials, 1983
Abstract W-type ferrites RxW = RxBa1-xFe18O27 (R = Ce, La) wer prepared. Their magnetic properties and Mossbauer spectra were measured. It was found that the substitution of Ce or La for Ba in BaW improves partially the chemical stability of W-type ferrites.
Kui Jisheng, Lu Huaixian, Du Youwei
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Off resonance relaxation in hexagonal ferrites

Journal of Magnetism and Magnetic Materials, 1986
Abstract The effective linewidth technique has been applied to study field dependent microwave losses in hexagonal ferrites for the first time. Data have been obtained on single crystal Zn2-Y and ZnTi-M as well as oriented polycrystalline NiCo-W materials.
M.V. Kogekar, C.E. Patton
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Hexagonal Ferrites for Millimeter Wave Applications

1993
Abstract : This final report presents a review of the work accomplished on this contract. A review of the physics of hexagonal ferrite materials and the effective linewidth concept and the detailed overall research plan are contained in the original proposal document. The focus of the program was on the effective linewidth in millimeter wave materials,
Carl E. Patton, Kristl B. Hathaway, Donald E. Polk   +2 more
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Microwave properties of planar hexagonal ferrites

IEEE Transactions on Magnetics, 1966
A large number of samples of hexagonal ferrite, with planar anisotropy incorporating various metal ions, were synthesized and tested for FMR (ferromagnetic resonance). Measurements were made at room temperature in transmission cavities at frequencies between 10 and 35 Gc/s on magnetically oriented polycrystalline compounds.
R. Braden, I. Gordon, R. Harvey
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Complex permeability of polycrystalline hexagonal ferrites

INTERMAG 2000 Digest of Technical Papers. 2000 IEEE International Magnetics Conference, 2000
Polycrystalline hexagonal ferrites (Y, Z and W-phases) were prepared by the usual ceramic sintering. Their complex permeability spectra were natural resonance type, and numerically separated into spin rotational and domain wall motion components. For the spin rotational component, it was found that the Snoek's product values of them were far beyond the
T. Nakamura, K. Hatakeyama
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Single-Domain Properties in Hexagonal Ferrites

Journal of Applied Physics, 1963
Barium ferrite platelet-shaped particles have been prepared with a diameter of 0.1 microns, which is an order of magnitude smaller than those obtained by conventional sintering and regrinding techniques. The preparation technique used has been optimized to produce the complete ferrite with σs=68 emu/g.
C. D. Mee, J. C. Jeschke
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Epitaxial Garnets and Hexagonal Ferrites.

1980
Abstract : The objective of this research is to develop new and improved epitaxial ferrite materials for use in microwave and millimeter-wave signal processing devices. The major emphasis has been on multiple layer magnetic garnet structures for magnetostatic wave (MSW) delay lines.
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Novel TiO2-doped semiconducting hexagonal ferrites

2015
Hexagonal ferrites are well known, globally important magnetic ceramics, with many applications in electronics and telecommunications, especially at microwave frequencies. However, for useful dielectric properties, it is usually required that they have a low degree of conductivity.
R Pullar, IVCiuchi, P Galizia, CGalassi
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The Microwave Properties of Aligned Hexagonal Ferrite Fibers

Journal of Materials Science Letters, 1998
Among the new class of planar hexagonal ferrites discovered between 1952 and 1956 by Philips [1, 2] were Y ferrite (Ba2M2Fe12O22), W ferrite (BaM2 Fe16O27) and Z ferrite (Ba3M2Fe24O41). These are all constructed from basic units of hexagonal barium M ferrite and cubic spinel ferrites in various combinations, and they retain a hexagonal structure ...
Pullar R. C., Appleton S. G., Bhattacharya A. K.   +2 more
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