Ni-F-Nb (50Ni-Fe組成) 合金薄膜の軟磁気特性
Ni-F-Nb (50Ni-Fe組成) 合金薄膜の軟磁気特性
复制标题
Ni-F-Nb（50Ni-Fe成分）合金薄膜的软磁性能
DOI：
10.3379/jmsjmag.14.305
复制
发表时间：
1990
期刊：
影响因子：
--
通讯作者：
徳雄 脇山
中科院分区：
文献类型：
--
作者：
研三 高橋;洋之 上住;武仁 島津;武信 佐藤;実可子 高橋;徳雄 脇山
针对Ni含量接近50wt%的Ni-Fe-Nb合金薄膜，系统地研究了软磁性能与局部各向异性波动之间的关系，该关系与薄膜的微观结构密切相关。根据霍夫曼的微磁波纹理论，随着耦合体积内晶粒数量N的增加，每个晶粒中的有效磁各向异性Ueff急剧减小。实验结果表明，Ni-Fe-Nb合金薄膜的局部各向异性波动强烈依赖于Ueff/Ku，并且随着Ueff/Ku的减小而减小。因此，为了在这些薄膜中实现高初始磁导率，有必要通过减小晶粒的尺寸来增加耦合体积内的N。对于Ni-Fe-Nb合金薄膜，需要减小小于200A的晶粒尺寸以获得大于2000的高初始磁导率。
The relation between soft magnetic properties and local anisotropy fluctuation, which is strongly connected with the microstructure of the films, was systematically examined for Ni-Fe-Nb alloy films with nearly 50 wt%Ni. According to the micromagnetic ripple theory by Hoffmann, effective magnetic anisotropy Ueff in each of the grains decreases drastically with increases in the number of grains N within the coupling volume. Experimental results show local anisotropy fluctuation for Ni-Fe-Nb alloy films strongly depends on Ueff/Ku, and it decreases with decreasing Ueff/Ku. Therefore, to realize high initial permeability in these films, it is necessary to increase N within the coupling volume by decreasing the size of the grains. In the case of Ni-Fe-Nb alloy films, decreasing the size of the grains less than 200A to obtain high initial permeability more than 2000 is needed.