Influence of rare earth Gd addition on the structural and magnetic transitions of Ni-Mn-Ga alloys

被引：21

作者：

Gao, L. ^{[1
]}

Sui, J. H. ^{[1
]}

Cai, W. ^{[1
]}

机构：

[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2008年 / 320卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

ferromagnetic-shape memory alloy; phase transition; curie temperature; rare earth gadolinium;

D O I：

10.1016/j.jmmm.2007.05.006

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Influence of rare earth Gd addition on the structural and magnetic transitions of polycrystalline Ni50Mn29Ga21 ferromagnetic-shape memory alloy (FSMA) are investigated. The results show that different martensitic phase transformation appears in different Gd content. Martensite structure changes from 5 M with 0.1 at% Gd to 7 M when the content of Gd is more than 0.1 at%. The martensitic and reverse martensitic transformation temperatures increase remarkably with increasing Gd content, whereas the Curie temperature almost keeps unchanged at low Gd content and subsequently decreases. Three kinds of Ni-Mn-Ga-Gd alloys are observed according to the sequence of the structural and magnetic transition, whose structural transition temperatures are lower, equal to or higher than the magnetic transition temperature. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：63 / 67

页数：5

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