Structures, magnetic properties, and magnetocaloric effect in MnCo1-xGe (0.02≤x≤0.2) compounds

被引：31

作者：

Fang, Yi-Kun ^{[1
]}

Yeh, Jia-Chun ^{[2
]}

Chang, Wen-Cheng ^{[2
]}

Li, Xiu-Mei ^{[1
]}

Li, Wei ^{[1
]}

机构：

[1] Cent Iron & Steel Res Inst, Div Funct Mat Res, Beijing 100081, Peoples R China

[2] Natl Chung Cheng Univ, Dept Phys, Chiayi, Taiwan

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2009年 / 321卷 / 19期

基金：

国家高技术研究发展计划(863计划);

关键词：

Intermetallic compound; Magnetocaloric effect; Magnetic refrigerant; METAMAGNETIC TRANSITION; PHASE-TRANSITIONS; ENTROPY CHANGE;

D O I：

10.1016/j.jmmm.2009.05.006

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The crystalline structures, magnetic properties and magnetocaloric effect (MCE) of MnCo1-xGe alloys (0.02 <= x <= 0.2) have been reported. The crystalline structures of MnCo1-xGe (x <= 0.06) alloys are mainly of TiNiSi-type phase, and Ni2In-type structure dominates for x > 0.06. With decreasing Co concentrations the saturated magnetization of these compounds decreases. Larger low-field magnetic entropy change -Delta S-M of about 2.3 J/kg K in MnCo0.94Ge alloy has been obtained for a magnetic field change of 1 T. Moreover, it is found that TiNiSi-type phase exhibits larger -Delta S-M that Ni2In-type one. For MnCo0.94Ge alloy, considerable low-field refrigerant capacity (RC) (similar to 460 mJ/cm(3)), low coercivity and easy synthesis make these alloys potential candidates for near-room temperature magnetic refrigerants. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：3053 / 3056

页数：4

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