Field-induced structural transition and the related magnetic entropy change in Ni43Mn43Co3Sn11 alloy

被引：48

作者：

Gao, B. ^{[1
]}

Hu, F. X. ^{[1
]}

Shen, J. ^{[1
]}

Wang, J. ^{[1
]}

Sun, J. R. ^{[1
]}

Shen, B. G. ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Phys, State Key Lab Magnetism, Beijing 100190, Peoples R China

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2009年 / 321卷 / 17期

基金：

中国国家自然科学基金;

关键词：

Field-induced structural transition; Magnetic entropy change; Heusler alloy; PHASE-TRANSFORMATION;

D O I：

10.1016/j.jmmm.2009.03.047

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetic properties and magnetic entropy change DS were investigated in Heusler alloy Ni43Mn43Co3Sn11. With decreasing temperature this alloy undergoes a martensitic structural transition at T-M = 188K. The incorporation of Co atoms enhances ferromagnetic exchange for parent phases. Austenitic phase with cubic structure shows strong ferromagnetic behaviors with Curie temperature T-C(A) at 346 K, while martensitic phase shows weak ferromagnetic properties. An external magnetic field can shift T-M to a lower temperature at a rate of 4.4 K/T, and a field-induced structural transition from martensitic to austenitic state takes place at temperatures near but below T-M. As a result, a great magnetic entropy change with positive sign appears. The size of Delta S reaches 33 J/kg K under 5T magnetic field. More important is that the Delta S displays a table-like peak under 5T, which is favorable for Ericsson-type refrigerators. (C) 2009 Elsevier B. V. All rights reserved.

引用

页码：2571 / 2574

页数：4

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