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标题：Structural and Magnetic Studies in Ni-Mn-Ga based Ferromagnetic Shape Memory Alloys
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作者：R. P. Mathur ; R. K. Singh ; S. Ray 等
期刊名称：Defence Science Journal
印刷版ISSN：0976-464X
出版年度：2011
卷号：61
期号：3
页码：275-284
DOI：10.14429/dsj.61.645
语种：English
出版社：Defence Scientific Information & Documentation Centre
摘要：Quaternary Ni 50 Fe x Mn 30-x Ga 20 ( x = 2.5, 5, and 15) and Ni 45 Fe 5 Mn 30 Ga 20 alloys based on modification of ferromagnetic shape memory alloy ternary Ni 50 Mn 30 Ga 20 composition prepared by vacuum arc melting and subsequent heat-treatment were investigated to understand the effect of varying Fe -content in Ni - Fe - Mn - Ga alloys. With increasing Fe -content, saturation magnetisation and Curie temperature increased, however martensite transformation temperature did not show a systematic variation. The 57 Fe Mossbauer spectra showed three distinct sub-spectra depending upon the site occupancy by Fe -atoms. The results are explained with site selection by Fe -atom in parent L21 lattice. Defence Science Journal, 2011, 61(3), pp.275-284 , DOI:http://dx.doi.org/10.14429/dsj.61.645
关键词：Ferromagnetic shape memory alloys, Ni-Fe-Mn-Ga alloys, Martensitic transformation, Mössbaeur spectroscopy