Mossbauer studies on structural ordering and magnetic properties of melt-spun Ni-Fe-Ga ribbons

被引：3
|
作者：
Rama Rao, N. V. [1 ,2 ]
Gopalan, R. [2 ]
Manivel Raja, M. [2 ]
Chandrasekaran, V. [2 ]
Suresh, K. G. [1 ]
机构：
[1] Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India
[2] Def Met Res Lab, Hyderabad 500058, Andhra Pradesh, India
来源：
APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 20期
关键词：
antisite defects; Curie temperature; ferromagnetic materials; gallium alloys; hyperfine interactions; iron alloys; magnetic moments; magnetisation; melt spinning; Mossbauer effect; nickel alloys; order-disorder transformations; shape memory effects;
D O I：
10.1063/1.3028342
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Ribbons of ferromagnetic shape memory Ni(2+x)Fe(1-x)Ga (x=0 and 0.12) alloys were prepared at wheel speeds of 12 and 35 m/s by melt spinning technique. The structural (site) disorder and the associated changes in the magnetic properties of the ribbons were investigated by (57)Fe Mossbauer spectroscopy and magnetization measurements respectively. Mossbauer spectra of Ni(2)FeGa ribbon revealed the presence of both L2(1) order and B2-like disorder with some amount of Fe antisite atoms on Ni site. The increase in Ni content was found to decrease the T(C) while its effect on T(M) was the opposite way.
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页数：3
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