MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
Origin of Perpendicular Magnetic Anisotropy in Tb-Fe Amorphous Alloy
Motoki OhtaKazumasa YamadaYoshihiko SatakeAsaya FujitaKazuaki Fukamichi
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2003 Volume 44 Issue 12 Pages 2605-2610

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Abstract

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.

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© 2003 The Japan Institute of Metals and Materials
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