权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

CRYSTALLOGRAPHIC ORIENTATION AND MAGNETIC ANISOTROPY IN COBALT/NOBLE METAL MULTILAYERS AND ALLOY FILMS

钴/贵金属多层膜和合金膜中的晶体取向和磁各向异性

基本信息

批准号：
07650372
负责人：
SHIOMI Shigeru
金额：
$ 1.34万
依托单位：
MIE UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

项目摘要

Structure and magnetic anisotropy of Co/Pt and Co/Au multilayrs evaporated on (100) -oriented underlayr : (100) -oriented Pt and Au underlayrs were epitaxially grown on a (100) -oriented NaCl substrate at a substrate temperature (Ts) of 300ﾟC.Co/Pt multilayrs evaporated on a (100) -oriented Pt underlayr are of (100) -oriented fcc structure independent of Ts from 30 to 400ﾟC.Out-of-plane magnetic anisotropy is negative without substrate heating but increases with elevating substrate temperature. This suggests that the formation of Co-Pt alloy at interface enhances out-of-plane magnetic anisotropy. Next, Co/Au multilayrs were evaporated on a (100) -orinted Au underlayr at Ts=100ﾟC.We could not identify the structure through X-ray diffraction measurements.However, electron diffraction measurements revealed that (100) -orinted fcc Co and (11.0) -oriented hcp Co coexist in the Co layr. Out-of-plane magnetic anisotropy is negative irrespective of Co layr thickness. In both Co/Pt and Co/Au multilayrs was seen in-plane magnetic anisotropy with four-fold symmetry, which seems to be ascribable to the magneto-crystalline anisotropy of fcc Co and/or hcp Co.(2) Structure and magnetic anisotropy of Co-Pt and Co-Au alloy films sputtered on (100) -oriented Ag underlayr : (100) -oriented Ag underlayrs were successfully sputtered on a (100) -oriented NaCl substrate without substrate heating. Co-Pt and Co-Au alloy films were sputtered on a (100) -orinted Ag underlayr. (100) -oriented Co-Pt alloy films were epitaxially grown on a (100) -oriented Ag underlayr, provided that the Pt content was higher than 40%.On the contrary, no preferential orientation was observed in Co-Au films irrespective of the Au content. Our-of-plane magnetic anisotropy is negative irrespective of the composition in both Co-Pt and Co-Au films. In-plane magnetic anisotropy with four-fold symmetry was seen in (100) -oriented Co-Pt alloy films.

在（100）取向衬底上蒸发的Co/Pt和Co/Au多层膜的结构和磁各向异性（100）取向的Pt和Au衬底在300 ℃的衬底温度（Ts）下外延生长在（100）取向的NaCl衬底上。在30到400 ℃之间，面外磁各向异性与Ts无关。在没有衬底加热的情况下，面外磁各向异性是负的，但随着衬底温度的升高而增加。这表明界面处Co-Pt合金的形成增强了面外磁各向异性。在Ts=100 ℃下，在（100）取向的Au衬底上蒸镀了Co/Au多层膜，通过X射线衍射测量，我们不能确定其结构，但电子衍射测量表明，（100）取向的fcc Co和（11.0）取向的hcp Co共存于Co层中。面外磁各向异性是负的，与Co层厚度无关。在Co/Pt和Co/Au多层膜中均观察到具有四重对称性的面内磁各向异性，这似乎归因于fcc Co和/或hcp Co的磁晶各向异性。(2)在（100）取向Ag衬底上溅射Co-Pt和Co-Au合金薄膜的结构和磁各向异性：在（100）取向NaCl衬底上成功地溅射了（100）取向的Ag衬底。在（100）取向的Ag衬底上溅射Co-Pt和Co-Au合金薄膜。(100)当Pt含量大于40%时，在（100）取向的Ag衬底上外延生长Co-Pt合金薄膜，而在Co-Au薄膜中，无论Au含量如何，都没有观察到择优取向。无论Co-Pt和Co-Au膜的成分如何，面外磁各向异性都是负的。在（100）取向的Co-Pt合金薄膜中观察到具有四重对称性的面内磁各向异性。