Origin of perpendicular magnetic anisotropy in Tb-Fe amorphous alloy

被引：11
|
作者：
Ohta, M [1 ]
Yamada, K
Satake, Y
Fujita, A
Fukamichi, K
机构：
[1] Tohoku Univ, Grad Sch Engn, Dept Mat Sci, Sendai, Miyagi 9808579, Japan
[2] Hakodate Natl Coll Technol, Dept Elect Engn, Hakodate, Hokkaido 0428501, Japan
来源：
MATERIALS TRANSACTIONS | 2003年 / 44卷 / 12期
关键词：
perpendicular magnetic anisotropy; terbium-iron amorphous alloy; thermal expansion; induced strain; magnetic optical disk;
D O I：
10.2320/matertrans.44.2605
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The origin of perpendicular magnetic anisotropy has been investigated in a thick Tb-Fe amorphous alloy plate prepared by dc high-rate sputtering, In the as-prepared samples with and without a Cu substrate, no distinct difference in perpendicular magnetic anisotropy was confirmed. After annealing, the perpendicular magnetic anisotropy in the sample with a Cu substrate was maintained, whereas that disappeared in the sample without a Cu substrate. Inducing thermal strains with an epoxy resin, the perpendicular magnetic anisotropy was restored. Therefore, it is concluded that the strong strains induced by the difference between the thermal expansion of the Tb-Fe amorphous alloy plate and the Cu substrate dominate to the origin of perpendicular magnetic anisotropy.
引用
收藏
页码：2605 / 2610
页数：6
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