Effects of the Mn/Co ratio on the magnetic transition and magnetocaloric properties of Mn1+xCo1-xGe alloys

被引：22
|
作者：
Ma Sheng-Can
Wang Dun-Hui [1 ]
Xuan Hai-Cheng
Shen Ling-Jia
Cao Qing-Qi
Du You-Wei
机构：
[1] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
来源：
CHINESE PHYSICS B | 2011年 / 20卷 / 08期
基金：
中国国家自然科学基金;
关键词：
Mn/Co ratio; magnetic transition; magnetocaloric properties; magnetic hysteresis losses; MARTENSITIC-TRANSFORMATION;
D O I：
10.1088/1674-1056/20/8/087502
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We have investigated the magnetic transition and magnetocaloric effects of Mn1+xCo1-xGe alloys by tuning the ratio of Mn/Co. With increasing Mn content, a series of first-order magnetostructural transitions from ferromagnetic to paramagnetic states with large changes of magnetization are observed at room temperature. Further increasing the content of Mn (x = 0.11) gives rise to a single second-order magnetic transition. Interestingly, large low-field magnetic entropy changes with almost zero magnetic hysteresis are observed in these alloys. The effects of Mn/Co ratio on magnetic transition and magnetocaloric effects are discussed in this paper.
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页数：4
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