The study of low-field positive and negative magnetic entropy changes in Ni43Mn46-xCuxSn11 alloys

被引：81

作者：

Wang, D. H. ^{[1
]}

Zhang, C. L. ^{[1
]}

Xuan, H. C. ^{[1
]}

Han, Z. D. ^{[1
]}

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

Tang, S. L. ^{[1
]}

Gu, B. X. ^{[1
]}

Du, Y. W. ^{[1
]}

机构：

[1] Nanjing Univ, Dept Phys, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2007年 / 102卷 / 01期

关键词：

D O I：

10.1063/1.2752140

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A series of Ni43Mn46-xCuxSn11 (x=1, 2, and 3) alloys was prepared by the arc melting method. The martensitic transition shifts to a higher temperature with increasing Cu concentration. The isothermal magnetization curves around the martensitic transition temperature show a typical metamagnetic behavior. Under a low applied magnetic field of 10 kOe, positive values of magnetic entropy change around the martensitic transition temperature are 14.1, 18.0, and 15.8 J/kg K for x=1, 2, and 3, respectively. While in the vicinity of the Curie temperature of the austenitic phase, these negative values are 1.1, 1.0, and 0.9 J/kg K for x=1, 2, and 3, respectively. The origin of the large entropy changes and the potential application for Ni43Mn46-xCuxSn11 alloys as a working substance for magnetic refrigeration are discussed. (c) 2007 American Institute of Physics.

引用

页数：4

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