Magnetocaloric effect of Gd12Co7

被引：20

作者：

Chen, X. ^{[2
]}

Zhuang, Y. H. ^{[1
]}

机构：

[1] Guangxi Univ, Inst Mat Sci, Key Lab Nonferrous Met & New Proc Technol Mat, Minist Educ, Nanning 530004, Guangxi, Peoples R China

[2] Neijiang Teachers Coll, Dept Phys & Elect Informat Engn, Neijiang 641002, Sichuan, Peoples R China

来源：

SOLID STATE COMMUNICATIONS | 2008年 / 148卷 / 7-8期

关键词：

Metals; Scanning electron microscopy; X-ray;

D O I：

10.1016/j.ssc.2008.08.036

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The sample of Gd12Co7 prepared by arc-melting and annealed for 60 days at 873 K was investigated by X-ray diffraction (X-ray), scanning electron microscope (SEM) and energy disperse spectroscopy (EDS). The result shows that the sample of Gd12Co7 in our work is almost single phase with the Ho12Co7-type monoclinic structure. The Magnetocaloric effect of Gd12Co7 was investigated by vibrating-sample magnetometer (VSM) from 100 to 280 K in different applied magnetic fields. The ferromagnetic-paramagnetic transition temperature in a field of 0.1T is about 163 K. The maximum magnetic-entropy change, vertical bar Delta S-M.max vertical bar. of Gd12Co7 is 2.96J kg(-1) K-1 and 4.60J kg(-1) K-1 for a field change of 0-1 T and 0-2 T, respectively. The Arrott plots show that magnetic phase transition of Gd12Co7 is second-order. Crown Copyright (C) 2008 Published by Elsevier Ltd. All rights reserved.

引用

页码：322 / 325

页数：4

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