Large magnetocaloric effect related to martensitic transformation in Ni50Co2Mn33In15 textured alloy

被引：15
作者：
Li, Z. [1 ]
Zhang, Y. L. [1 ]
Xu, K. [1 ]
Jing, C. [2 ]
机构：
[1] Qujing Normal Univ, Yunnan High Educ Inst, Key Lab Adv Funct & Low Dimens Mat, Coll Phys & Elect Engn, Qujing 655011, Peoples R China
[2] Shanghai Univ, Dept Phys, Shanghai 200444, Peoples R China
来源：
PHYSICA B-CONDENSED MATTER | 2015年 / 476卷
基金：
中国国家自然科学基金;
关键词：
Heusler alloy; Martensitic transformation; Magnetocaloric effect;
D O I：
10.1016/j.physb.2015.05.002
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
This paper presents the inverse magnetocaloric effect associated with martensitic transformation in a polycrystalline Ni50Co2Mn33In15 alloy. Through the structural measurements, it is found that the bulk sample have a well-developed preferred orientation. The isothermal entropy change (Delta S-T) has been calculated by changes of volume fractions at certain temperature based on Clausius-Clapeyron equation for different magnetic fields. The maximum Delta S-T. of Ni50Co2Mn33In15 reaches 21.5 J/kg K and keeps in the relative broad temperature range, leading to a great refrigerant capacity under a moderate magnetic field. This can be ascribed to the fact that present textured alloy shows a large shifts in the transition equilibrium temperature with magnetic field as well as a narrow transformation width. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：179 / 182
页数：4
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