Large low-field inverse magnetocaloric effect near room temperature in Ni50-x Mn37+x In13 Heusler alloys

被引：21

作者：

Rao, N. V. Rama ^{[1
,2
]}

Gopalan, R. ^{[1
]}

Chandrasekaran, V. ^{[1
]}

Suresh, K. G. ^{[2
]}

机构：

[1] Def Met Res Lab, Hyderabad 500058, Andhra Pradesh, India

[2] Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India

来源：

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2010年 / 99卷 / 01期

关键词：

MAGNETIC ENTROPY CHANGE; TRANSITION;

D O I：

10.1007/s00339-009-5517-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Low field inverse magnetocaloric effect (IMCE) associated with first-order martensitic transition in Ni50-x Mn37+x In-13 (x=3,4,5) alloys was investigated. By tuning the composition of Ni/Mn, large change in the magnetization occurring between martensite and austenite phases in a narrow temperature interval was achieved, which results in large IMCE. Under low magnetic field change of 2 T, a large positive magnetic entropy change (Delta S (M) ) of 23.5 J/kg K with a net refrigeration capacity of 53 J/kg was obtained near room temperature (308 K) in the x=3 alloy. The results show that a small variation in Ni/Mn ratio significantly influences the martensitic transition temperature and the associated magnetic and magnetocaloric properties.

引用

页码：265 / 270

页数：6

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