Structure and magnetic properties of Heusler alloy Co2RuSi melt-spun ribbons

被引：11

作者：

Xin, Yuepeng ^{[1
]}

Ma, Yuexing ^{[1
]}

Hao, Hongyue ^{[1
]}

Luo, Hongzhi ^{[1
,2
]}

Meng, Fanbin ^{[1
]}

Liu, Heyan ^{[1
]}

Liu, Enke ^{[2
]}

Wu, Guangheng ^{[2
]}

机构：

[1] Hebei Univ Technol, Sch Mat Sci & Engn, Tianjin 300130, Peoples R China

[2] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2017年 / 435卷

基金：

中国国家自然科学基金;

关键词：

Heusler alloys; Melt-spinning; Magnetic properties; Site preference; Electronic structure; MECHANICAL-PROPERTIES; ELECTRONIC-STRUCTURE; CRYSTAL-STRUCTURE; PHASE-STABILITY; 1ST-PRINCIPLES; TRANSITION; RU2MNGE;

D O I：

10.1016/j.jmmm.2017.03.077

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Heusler alloy Co2RuSi has been synthesized by melt-spinning technology successfully. Co2RuSi bulk sample after annealing is composed of an HCP Co-rich phase and a BCC Ru-Si phase, but melt-spinning can suppress the precipitation of the HCP phase and produce a single Co2RuSi Heusler phase. In the XRD pattern, it is found that Ru has a strong preference for the (A, C) sites, though it has fewer valence electrons compared with Co. This site preference is different from the case in Heusler alloys containing only 3d elements and is supported further by first-principles calculations. Melt-spun Co2RuSi has a Ms of 2.67 mu(B)/f.u. at 5 K and a Tc of 491 K. An exothermic peak is observed at 871 K in the DTA curve, corresponding to the decomposition of the Heusler phase. Finally, the site preference and magnetic properties of Co2RuSi were discussed based on electronic structure calculation and charge density difference. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：76 / 80

页数：5

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