Room temperature magnetocaloric effect in Mn1.25Fe1.75Ga Heusler alloys

被引：4

作者：

El-Gendy, Ahmed A. ^{[1
,2
]}

Hadjipanayis, George C. ^{[1
]}

机构：

[1] Univ Delaware, Dept Phys & Astron, Sharp Lab 217, Newark, DE 19711 USA

[2] NIS, Nanotechnol & Nanometrol Lab, 136 Tersa St, Giza 12211, Egypt

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2016年 / 665卷

关键词：

Heuslar Alloys; Magnetocaloric; MAGNETIC ENTROPY CHANGE; TRANSITION;

D O I：

10.1016/j.jallcom.2016.01.067

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：

A room temperature magnetocaloric material with composition Mn1.25Fe1.75Ga is reported in this paper. The as-synthesized melt-spun ribbons have the pure L2(1) cubic structure and a homogeneous microstructure with an average grain size of 6 mm and show a ferromagnetic to paramagnetic transition at 296 K. The change in entropy determined from the M versus H curves was found to be 3 J kg(-1) K-1 at 296 K and 3 T, which is good in comparison with the values of commonly used materials for magnetic refrigeration. However, in comparison with other materials, the room temperature magnetocaloric effect is obtained by tuning the composition of the parent alloy without the need of another heat treatment. This important result opens opportunities for magnetic refrigeration near room temperature. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：319 / 322

页数：4

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