Growth temperature dependent structural and magnetic properties of epitaxial Co2FeAl Heusler alloy films

被引：23
作者：
Qiao, Shuang [1 ]
Nie, Shuaihua [1 ]
Zhao, Jianhua [1 ]
Zhang, Xinhui [1 ]
机构：
[1] Chinese Acad Sci, Inst Semicond, State Key Lab Superlattices & Microstruct, Beijing 100083, Peoples R China
来源：
JOURNAL OF APPLIED PHYSICS | 2013年 / 113卷 / 23期
基金：
中国国家自然科学基金;
关键词：
MOLECULAR-BEAM EPITAXY; ANISOTROPY; BEHAVIOR;
D O I：
10.1063/1.4811688
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The structural and magnetic properties of a series of Co2FeAl Heusler alloy films grown on GaAs(001) substrate by molecular beam epitaxy have been studied. The epitaxial Co2FeAl films with an ordered L-21 structure have been successfully obtained at growth temperature of 433 K, with an in-plane cubic magnetic anisotropy superimposed with an unusual uniaxial magnetic anisotropy. With increasing growth temperature, the ordered L-21 structure degrades. Meanwhile, the uniaxial anisotropy decreases and eventually disappears above 673 K. The interfacial bonding between As and Co or Fe atom is suggested to be responsible for the additional uniaxial anisotropy. (C) 2013 AIP Publishing LLC.
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页数：4
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