Negative magnetocaloric effect from highly sensitive metamagnetism in CoMnSi1-xGex

被引：125
作者：
Sandeman, K. G.
Daou, R.
Ozcan, S.
Durrell, J. H.
Mathur, N. D.
Fray, D. J.
机构：
[1] Univ Cambridge, Dept Mat Sci & Engn, Cambridge CB2 3QZ, England
[2] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England
来源：
PHYSICAL REVIEW B | 2006年 / 74卷 / 22期
关键词：
D O I：
10.1103/PhysRevB.74.224436
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report a negative magnetocaloric effect in CoMnSi1-xGex arising from a metamagnetic magnetoelastic transition. The effect is of relevance to magnetic refrigeration over a wide range of temperature, including room temperature. In addition we report a very high shift in the metamagnetic transition temperature with applied magnetic field. This is driven by competition between antiferromagnetic and ferromagnetic order which can be readily tuned by applied pressure and compositional changes.
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页数：6
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