Exchange coupling in amorphous rare earth-iron alloys
Exchange coupling in amorphous rare earth-iron alloys
复制标题
非晶态稀土铁合金中的交换耦合
DOI：
10.1063/1.30549
复制
发表时间：
2008
期刊：
影响因子：
--
通讯作者：
R. Potter
中科院分区：
文献类型：
--
作者：
N. Heiman;Kenneth K. C. Lee;R. Potter
稀土-过渡金属非晶态合金为研究非晶态磁性材料的基本磁现象提供了一个很好的系统。非晶态RE-TM合金的磁性能的敏感性，轻微的成分变化表明，需要一个快速的调查，其性能的系统变化。简要回顾了这一调查和理论模型。一个结果是指出Fe作为最有利的TM获得更详细的了解的磁性。本文给出了RE（Gd，Tb，Dy，Ho，Tm，Yb，Lu）-Fe非晶合金薄膜的穆斯堡尔效应、磁强计和磁光测量数据。穆斯堡尔效应的结果表明，Fe自旋随RE含量的增加而减少，但减少的速率是依赖于RE的有效自旋，（g - 1）J。提出了一个平均场理论模型，合理地再现了非晶RE-Fe合金的磁性能，并提供了有用的见解，他们的属性。图9，参考文献30篇。
The technologically important amorphous rare earth (RE)-transition metal (TM) alloys provide an excellent system for investigating basic magnetic phenomena in amorphous magnetic materials. The sensitivity of the magnetic properties of the amorphous RE-TM alloys to slight compositional changes indicated the need for a rapid survey of the systematic variation of their properties. A brief review of this survey and the theoretical models is presented. One result is to point out Fe as the most favorable TM for obtaining a more detailed understanding of the magnetic properties. Data are presented from /sup 57/Fe Moessbauer effect, magnetometer and magneto-optic measurements on amorphous RE(Gd, Tb, Dy, Ho, Tm, Yb, Lu)-Fe amorphous alloy films. The Moessbauer effect results indicate that the Fe spin decreases with increasing RE content but the rate of decrease is dependent on the RE effective spin, (g - 1)J. A mean field theory model is presented which reasonably reproduces the magnetic properties of the amorphous RE--Fe alloys, and which provides useful insights into their properties. 9 figures, 30 references.