日本応用磁気学会誌
Online ISSN : 1880-4004
Print ISSN : 0285-0192
多層膜・人工格子・交換結合
蒸着法で作製したNi-Fe/Mn-(Ni-Fe)積層膜の構造と交換磁気異方性
甲野藤 真佐藤 岳角田 匡清高橋 研
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ジャーナル オープンアクセス

2000 年 24 巻 4_2 号 p. 639-642

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The correlation between the microstructure of the antiferro-magnetic (AF) layer and the unidirectional anisotropy constant (Jk) measured at room temperature was investigated for Ni-Fe 500 Å/Mn1-x(Ni-Fe)x 500 Å (x = 0.2-0.5) bilayers. The bilayers were fabricated on the glass substrate with and without a 60-Å-thick Ti buffer layer by the vacuum evaporation method. In the bilayers fabricated directly on the glass substrate, the grain size of the AF layer was about 120 Å and Jk was about 0.02 erg/cm2 in the as-deposited state, when x = 0.2-0.3. On the other hand, when the Ti bufffer layer was used, the grain size of the AF layer was enlarged to 200 Å, and Jk was enhanced to 0.06 erg/cm2. After annealing at 280°C, the Jk value of the bilayer using the Ti buffer layer reached 0.18 erg/cm2, which is 1.5 times larger than without the Ti buffer layer. We concluded that enlargement of the AF grain is one of key factors for enhancing the exchange anisotropy of a ferromagnetic/AF bilayer.

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© 2000 (社)日本応用磁気学会
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