Temperature variation of structure and magnetic properties of Ni-Mn-Ga magnetic shape memory alloys

被引：65

作者：

Heczko, O

Lanska, N

Soderberg, O

Ullakko, K

机构：

[1] Helsinki Univ Technol, Dept Engn Phys, Biomed Engn Lab, FIN-02015 Espoo, Finland

[2] Helsinki Univ Technol, Met Phys & Sci Mat Lab, FIN-02015 Helsinki, Finland

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2002年 / 242卷

关键词：

magnetic shape memory alloy; magnetoelastic deformation; martensitic transformation; alloys; giant field-induced strain;

D O I：

10.1016/S0304-8853(01)01087-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

When cooling from high temperature, the Material of composition Ni48.5Mn30.3Ga21.2 Undergoes several magnetic and structural transitions, The phases are. at high temperature austenitic Cubic L2(1) phase: at 297 K 5-layered modulated tetragonal martensite: and below 210 K non-modulated tetragonal martensitic phase with c a larger than unity. Five-layered martensite exhibits giant field-induced strain of about 6% (magnetic shape memory (MSM) effect). The mechanism of the MSM effect was substantiated by simultaneous measurement of the strain and magnetization, (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：1446 / 1449

页数：4

共 12 条

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