Giant magnetic-field-induced strains in Heusler alloy NiMnGa with modified composition

被引：191

作者：

Wu, GH

Yu, CH

Meng, LQ

Chen, JL

Yang, FM

Qi, SR

Zhan, WS

Wang, Z

Zheng, YF

Zhao, LC

机构：

[1] Chinese Acad Sci, Inst Phys, State Key Lab Magnetism, Beijing 100080, Peoples R China

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

来源：

APPLIED PHYSICS LETTERS | 1999年 / 75卷 / 19期

关键词：

D O I：

10.1063/1.125211

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A giant magnetic-field-induced strain (MFIS) of -3100 ppm has been obtained in Heusler alloy Ni52Mn22.2Ga25.8 single crystal in the [001] direction at a temperature from 23 to 31 degrees C. This MFIS reaches saturation in an applied field about 6 kOe, and exhibits the same amplitude with an opposite sign while the field is perpendicular to the samples. According to a previous model, this MFIS associates with the twin boundary motion. The martensitic self-strain has been found to be 2%, implying a preferential orientation of martensite variants. Results related to the magnetic properties are discussed. (C) 1999 American Institute of Physics. [S0003-6951(99)02545-0].

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页码：2990 / 2992

页数：3

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