The magnetic phase transitions and magnetocaloric effect in MnNi1-xCoxGe alloys

被引：10
|
作者：
Zhang, C. L. [1 ]
Chen, J. [1 ]
Wang, T. Z. [1 ]
Xie, G. X. [1 ]
Zhu, C. [1 ]
Wang, D. H. [2 ,3 ]
机构：
[1] Jiangnan Univ, Sch Sci, Wuxi 214122, Peoples R China
[2] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
[3] Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China
来源：
SOLID STATE COMMUNICATIONS | 2011年 / 151卷 / 19期
基金：
中国国家自然科学基金;
关键词：
Metamagnetic transitions; Magnetocaloric effect; ENTROPY CHANGE; CRYSTAL;
D O I：
10.1016/j.ssc.2011.06.017
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The magnetic phase transitions and the magnetocaloric effects in MnNi1-xCoxGe (x = 0.38 and 0.40) alloys were investigated. The substitution of Co for Ni in the MnNiGe antiferromagnet results in the metamagnetic transitions from antiferromagnetic to ferromagnetic state, which associates with very small thermal and magnetic hystereses. Positive and negative values of magnetic entropy changes are exhibited around the metamagnetic transition temperature and Curie temperature, respectively. The relatively large refrigerant capacity in low magnetic field along with the good reversibility suggest that MnNi1-xCoxGe (x = 0.38 and 0.40) alloys are potential candidates for magnetic refrigeration. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1359 / 1362
页数：4
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