Large inverse magnetocaloric effect in Ni48.5-xCoxMn37Sn14.5 (x=0, 1 and 2) with negligible hysteresis

被引：28

作者：

Ghosh, Arup ^{[1
]}

Mandal, Kalyan ^{[1
]}

机构：

[1] SN Bose Natl Ctr Basic Sci, Dept Condensed Matter Phys & Mat Sci, Magnetism Lab, Kolkata 700098, India

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2013年 / 579卷

关键词：

Heusler alloys; Magnetocaloric effect; Magneto-structural transition; Refrigerant capacity; Exchange bias;

D O I：

10.1016/j.jallcom.2013.06.062

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Structural and magnetic transitions of Ni48.5-xCoxMn37Sn14.5 (x = 0, 1 and 2) alloys were studied by thermal, electrical and magnetic measurements. The exchange bias was found to be present in all the samples below 120 K. Contrary to other Heusler alloys, no magnetic hysteresis was observed in the isothermal M-H curves for x = 0 sample at the first order magneto-structural transition. Large magnetic entropy change (Delta S-M) similar to 6.15, 10.36 and 9.85 J/kg K was obtained respectively for x = 0, 1 and 2 due to a change of only 1.5 T magnetic field. Incorporating hysteresis losses, refrigerant capacity was estimated to be 50, 74 and 54.7 J/kg for the same samples respectively. (c) 2013 Published by Elsevier B.V.

引用

页码：295 / 299

页数：5

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