Complex permeability of polycrystalline hexagonal ferrites

Author

Nakamura, Tatsuya ; Hatakeyama, Ken-ichi

Author_Institution

R&D Div., Toda Kogyo Corp., Otake, Japan

Volume

36

Issue

5

fYear

2000

fDate

9/1/2000 12:00:00 AM

Firstpage

3415

Lastpage

3417

Abstract

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 product values of spinel ferrite. It enabled us to design thin electromagnetic wave absorbers for the quasimicrowave region

Keywords

Snoek effect; barium compounds; cobalt compounds; electromagnetic wave absorption; ferrites; magnetic domain walls; magnetic permeability; nickel compounds; sintering; zinc compounds; Ba(CoZn)₂Fe₁₅O₂₇; Ba₂(NiZn)₂Fe₁₂O₂₂; Ba₃(CoZn)₂Fe₂₄O₄₁; Snoek´s product; ceramic sintering; complex permeability spectra; domain wall motion; polycrystalline hexagonal ferrites; quasimicrowave region; spin rotation; thin electromagnetic wave absorbers; Ceramics; Electromagnetic scattering; Ferrites; Iron; Magnetic resonance imaging; Milling; Permeability; Powders; Radio frequency; Zinc;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.908844

Filename

908844