The giant magnetocaloric effect in Gd5Si2Ge2 with low purity gadolinium

被引：9
|
作者：
Zhang, TB
Chen, YG [1 ]
Fu, H
Teng, BH
Tang, YB
Tu, MJ
机构：
[1] Sichuan Univ, Sch Mat Sci & Engn, Chengdu 610065, Peoples R China
[2] Natl Univ Singapore, Dept Phys, Singapore 117542, Singapore
来源：
CHINESE SCIENCE BULLETIN | 2005年 / 50卷 / 16期
关键词：
magnetic refrigerant; Gd5Si2Ge2; magnetocaloric effect;
D O I：
10.1360/982005-349
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
The giant magnetocaloric effect Gd5Si2Ge2 alloy was prepared with 99wt% low purity commercial Gd. Powder XRD and magnetic measurements showed that the Gd5Si2Ge2 alloy annealed at 1200 degrees C for 1 h had a significant magnetic- crystallographic first order phase transition at about 270 K. The maximal magnetic entropy change is 17.55 J-kg(-1)-K-1 under a magnetic field change of 0-5 T. The distinct increase of magnetic entropy change belongs to the first-order phase transition from the orthorhombic Gd5Si4-type to the monoclinic Gd5Si2Ge2-type after high temperature heat-treatment.
引用
收藏
页码：1811 / 1814
页数：4
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