DETERMINATION OF THE STRUCTURAL ANISOTROPY IN AMORPHOUS TB-FE FILMS

被引:8
作者
HARRIS, VG
AYLESWORTH, KD
DAS, BN
ELAM, WT
KOON, NC
机构
[1] Naval Research Laboratory, Washington, D. C.
关键词
D O I
10.1109/20.179685
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
We report the measurement and description of an anisotropy between the in-plane and out-of-plane atomic structure in as-deposited amorphous Tb-Fe alloy films. This anisotropy, measured using a conversion-electron extended x-ray absorption fine structure (EXAFS) technique, correlates closely with measured values of the perpendicular magnetic anisotropy energy as a function of both film composition and annealing temperature. Modeling of the EXAFS data using theoretical codes and structural standards suggests that the Tb-Tb and Fe-Fe pair correlations are greater parallel to the film plane and the Tb-Fe pair correlations are greater perpendicular to the film plane. Upon annealing at 300-degrees-C the structural anisotropy is eliminated and the magnetic anisotropy is lowered to a level consistent with magnetoelastic interactions between the film and substrate.
引用
收藏
页码:2958 / 2963
页数:6
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