Magnetic properties of Heusler alloy Mn2RuGe and Mn2RuGa ribbons

被引：20
|
作者：
Yang, Ling [1 ]
Liu, Bohua [1 ]
Meng, Fanbin [1 ]
Liu, Heyan [1 ]
Luo, Hongzhi [1 ,2 ]
Liu, Enke [2 ]
Wang, Wenhong [2 ]
Wu, Guangheng [2 ]
机构：
[1] Hebei Univ Technol, Sch Mat Sci & Engn, Tianjin 300130, Peoples R China
[2] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2015年 / 379卷
基金：
中国国家自然科学基金;
关键词：
Heusler alloys; Electronic structure; Melt-spinning; Magnetic properties; HALF-METALLIC FERRIMAGNETISM; MARTENSITIC-TRANSFORMATION; GE;
D O I：
10.1016/j.jmmm.2014.12.001
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Heusler alloys Mn2RuGe and Mn2RuGa have been prepared by melt-spinning method successfully. Theoretical and experimental studies reveal a ferrimagnetic ground state in the two alloys. The Curie temperatures are 303 K for Mn2RuGe and 272 K for Mn2RuGa. The calculated total spin moments of Mn2RuGe and Mn2RuGa are integral values of 2.00 mu(B) and 1.03 mu(B), respectively. And the theoretical spin polarization ratio is also quite high. However, due to the atomic disorder in the ribbons, the saturation moments of them measured at 5 K are smaller than the calculated values, especially that of Mn2RuGa. This coincides with the disappearance of the superlattice reflection (111) and (200) peaks in the XRD pattern of Mn2RuGa. Annealing Mn2RuGa ribbon at 773 K can enhance the atomic ordering. Both saturation magnetic moment and Curie temperature increase obviously after the heat treatment. (C) 2014 Elsevier B.V. All rights reserved.
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页码：1 / 5
页数：5
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