期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 290, 期 -, 页码 787-794出版社
ELSEVIER
DOI: 10.1016/j.jmmm.2004.11.397
关键词
Ni-Mn-Ga magnetic shape memory alloy; giant-field-induced strain; ferromagnetic martensite; magnetic domain structure
Simultaneous experimental determination of magnetization reversal M = M(H, sigma) and magnetic-field-induced strain epsilon = epsilon(H, sigma) as a function of magnetic field, H, and external stress, sigma, gives full macroscopic description of the behaviour of MSM material. Moreover, by simultaneous measurements of M and epsilon, the direct relation between magnetization and strain can be established. We measured these relations in different alloys and samples exhibiting different strain responses. The experimental dependences are interpreted within the framework of a simple energy model. The necessary conditions for the existence of magnetic shape memory effect are discussed and compared with the experiment. (c) 2004 Elsevier B.V. All rights reserved.
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