Magnetic properties and atomic ordering of BCC Heusler alloy Fe2MnGa ribbons

被引：17
|
作者：
Xin, Yuepeng [1 ]
Ma, Yuexing [1 ]
Luo, Hongzhi [1 ]
Meng, Fanbin [1 ]
Liu, Heyan [1 ]
机构：
[1] Hebei Univ Technol, Sch Mat Sci & Engn, Tianjin 300130, Peoples R China
来源：
PHYSICA B-CONDENSED MATTER | 2016年 / 489卷
基金：
中国国家自然科学基金;
关键词：
Heusler alloys; Electronic structure; Magnetic properties; Anti-site disorder; ELECTRONIC-STRUCTURE; CRYSTAL-STRUCTURE; MN; FE; TI;
D O I：
10.1016/j.physb.2016.02.030
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The electronic structure, atomic disorder and magnetic properties of the Heusler alloy Fe2MnGa have been investigated experimentally and theoretically. BCC Fe2MnGa ribbon samples were prepared. Experimentally, a saturation magnetic moment (3.68 LIB at 5 K) much larger than the theoretical value (2.04 mu(B)) has been reported. First-principles calculations indicate that the difference is related to the Fe-Mn disorder between A, B sites, as can also be deduced from the XRD pattern. L2(1) type Fe2MnGa is a ferrimagnet with antiparallel Fe and Mn spin moments. However, when Fe-Mn disorder occurs, part of Mn moments will be parallel to Fe moments, and the Fe moments also clearly increase simultaneously. All this results in a total moment of 3.74 mu(B), close to the experimental value. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：51 / 55
页数：5
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