Magnetic properties and magnetocaloric effect in Ni-Mn-Sn alloys

被引：41

作者：

Dan, N. H. ^{[1
]}

Duc, N. H. ^{[1
]}

Yen, N. H. ^{[1
]}

Thanh, P. T. ^{[1
]}

Bau, L. V. ^{[2
]}

An, N. M. ^{[2
]}

Anh, D. T. K. ^{[3
]}

Bang, N. A. ^{[3
]}

Mai, N. T. ^{[3
]}

Anh, P. K. ^{[4
]}

Thanh, T. D. ^{[1
,5
]}

Phan, T. L. ^{[5
]}

Yu, S. C. ^{[5
]}

机构：

[1] Vietnam Acad Sci & Technol, Inst Mat Sci, Hanoi, Vietnam

[2] Hong Duc Univ, Thanh Hoa, Vietnam

[3] VNU Univ Sci, Fac Phys, Hanoi, Vietnam

[4] Vietnam Acad Mil Sci, Hanoi, Vietnam

[5] Chungbuk Natl Univ, Dept Phys, Cheongju 361763, South Korea

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2015年 / 374卷

关键词：

Magnetic transition; Giant magnetocaloric effect; Heusler alloy; Magnetic refrigeration; TRANSFORMATION; TRANSITION;

D O I：

10.1016/j.jmmm.2014.08.061

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetic and magnetocaloric properties in Ni50Mn50-x Sn-x alloys with wide range of the Sn-concentration (x=0-40) were investigated. The alloys were prepared by arc melting and subsequently annealing at 850 degrees C for 4 h. The X-ray diffraction analyses manifest the formation of the crystalline phases (Ni2MnSn, NiMn, Ni3Sn2, Mn3Sn, and MnSn2) in the alloys with various compositions and fabrication conditions. With increasing x, the saturation magnetization first increases from near zero (at x=10) to above 40 emu/g (at x=20) and then decreases to below 10 emu/g (at x=40) for both the as melted and annealed cases. The martensitic-austenitic transition was observed in the alloys with a narrow range of x (13-15). The magnetic transitions in the alloy can be controlled by changing Sn-concentration. The alloy reveals both the positive and negative entropy changes with quite large magnitude (Delta S-m > 1 J/kg K with Delta H = 12 kOe) with appropriate compositions and annealing conditions. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：372 / 375

页数：4

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