Influence of ion substitution on the magnetic structure and permeability of Z-type hexagonal Ba-ferrites: Ba3Co(2-x)Fe(24+x-y)CryO41

Z-type hexagonal ferrite samples Ba3Co2-xFe24+x+yCryO41 (0 < or = x < or = 0.6, 0 < or = y < or = 0.8) in which Co2+ and Fe3+ were substituted with Fe2+ and Cr3+, respectively, were prepared by the ceramic process in oxygen atmosphere. The simultaneous substitution was found to enhance t...

Full description

Saved in:
Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2004-12, Vol.284, p.369-375
Main Authors: Tachibana, Takeshi, Nakagawa, Takashi, Takada, Yukio, Shimada, Takeshi, Yamamoto, Takao A
Format: Article
Language:English
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Z-type hexagonal ferrite samples Ba3Co2-xFe24+x+yCryO41 (0 < or = x < or = 0.6, 0 < or = y < or = 0.8) in which Co2+ and Fe3+ were substituted with Fe2+ and Cr3+, respectively, were prepared by the ceramic process in oxygen atmosphere. The simultaneous substitution was found to enhance the permeability. In an isotropic sample, the maximum mur was 21, and the peak value of mur was 14 at 1 GHz. Crystal anisotropy fields were evaluated by measuring anisotropic magnetization behavior of a sample press-compacted in a magnetic field in order to investigate the influences of the cation substitution on the permeability. The results indicated that the simultaneous substitution mainly caused the variation of the crystal anisotropy fields rather than the change of saturation magnetization.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2004.06.056