Structural and Magnetic Studies on Ni-Mn-Ga-based Ferromagnetic Shape Memory Alloys

被引：3

作者：

Mathur, R. P. ^{[1
]}

Singh, R. K.

Ray, S. ^{[2
]}

Raja, M. Manivel

Ghosal, P. ^{[1
]}

Chandrasekaran, V.

机构：

[1] Def Met Res Lab, Electron Micoscopy Grp, Hyderabad 500058, Andhra Pradesh, India

[2] Indian Inst Technol, Roorkee 247667, Uttar Pradesh, India

来源：

DEFENCE SCIENCE JOURNAL | 2011年 / 61卷 / 03期

关键词：

Ferromagnetic shape memory alloys; Ni-Fe-Mn-Ga alloys; Martensitic transformation; Mossbauer spectroscopy; PHASE-TRANSITIONS; HYPERFINE FIELDS; CO; FE;

D O I：

10.14429/dsj.61.645

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Quaternary Ni50FexMn30-xGa20 (x = 2.5, 5, and 15) and Ni45Fe5Mn30Ga20 alloys based on modification of ferromagnetic shape memory alloy ternary Ni50Mn30Ga20 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 Fe-57 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 L2(1) lattice.

引用

页码：275 / 284

页数：10

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