Effect of Sb-doping on martensitic transformation and magnetocaloric effect in Mn-rich Mn50Ni40Sn10-xSbx (x=1, 2, 3, and 4) alloys

被引：5
作者：
Shah, Ishfaq Ahmad [1 ]
ul Hassan, Najam [1 ]
Liu, Jun [1 ]
Gong, Yuanyuan [1 ]
Xu, Guizhou [1 ]
Xu, Feng [1 ]
机构：
[1] Nanjing Univ Sci & Technol, Sch Mat Sci & Engn, Jiangsu Key Lab Adv Micro & Nano Mat & Technol, Nanjing 210094, Jiangsu, Peoples R China
来源：
CHINESE PHYSICS B | 2017年 / 26卷 / 01期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
Mn-rich Heusler alloys; martensitic transformation; magnetocaloric effect; magnetic entropy change; TRANSITION;
D O I：
10.1088/1674-1056/26/1/017501
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We investigate the influence of Sb-doping on the martensitic transformation and magnetocaloric effect in Mn50Ni40Sn10-xSbx (x = 1, 2, 3, and 4) alloys. All the prepared samples exhibit a B2-type structure with the space group Fm3m at room temperature. The substitution of Sb increases the valence electron concentration and decreases the unit cell volume. As a result, the magnetostructural transformation shifts rapidly towards higher temperatures as x increases. The changes in magnetic entropy under different magnetic field variations are explored around this transformation. The isothermal magnetization curves exhibit typical metamagnetic behavior, indicating that the magnetostructural transformation can be induced by a magnetic field. The tunable martensitic transformation and magnetic entropy changes suggest that Mn50Ni40Sn10-xSbx alloys are attractive candidates for applications in solid-state refrigeration.
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页数：5
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