日本応用磁気学会誌
Online ISSN : 1880-4004
Print ISSN : 0285-0192
ISSN-L : 0285-0192
Microstructure and Micromagnetics
Mössbauer and Magnetic Study of Composite Ba-ferrite Particles Containing α-Fe
Shin'ichi KITAHATAMikio KISHIMOTO
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ジャーナル オープンアクセス

1994 年 18 巻 S_1_PMRC_94_1 号 p. S1_3-6

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  Composite Ba-ferrite particles containing α-Fe were made by reducing Co-Ti-Sn substituted Ba-ferrite platelet particles in hydrogen gas. The crystal structure of Ba-ferrite is represented as the stacking of S and R layer, and the α-Fe in the composite Ba-ferrite particles was considered to be introduced primarily in the S layer in the Ba-ferrite hexagonal structure. The (110) plane of the α-Fe was parallel to the c plane of the hexagonal structure. The magnetic easy direction of the particles inclined to the plane for the samples with saturation magnetization larger than 62emu/g. The remanent coercivity of the particles was increased by introducing the α-Fe in the particles. These results indicated that the prepared particles were the composite magnetic particles consisting of hard material (Ba-ferrite) and soft one (α-Fe) behaving like a exchange spring magnet.
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© 1994 by The Magnetics Society of Japan
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