会议专题

Effect of small amount of Zn additions on the magnetocaloric properties of Gd5Si2Ge2 alloy

The structural and magnetic property of Gd5Si1.99Ge2Zn0.01and Gd5Si2Ge2 alloys prepared by arc-melting the starting materials with commercial available purity (99.95wt%) was investigated by x-ray diffraction and Vibrating Sample Magnetometer. The result shows that the Gd5Si1.99Ge2Zn0.01 alloy has monoclinic phase with Gd5Si2Ge2-type structure. The polymorphic orthorhombic phase with Gd5Si4-type structure coexists with the monoclinic phase in Gd5Si2Ge2 alloy. The addition of small Zn element in Gd5Si2Ge2 alloy results in a considerable enhancement of its magnetocaloric effect. The maximum magnetic entropy change rapidly increases from 5.03J/(kg K) to 20.70J/(kg K) for a magnetic field change from 0 to 1.5T. The magnetic order temperature is 278K in Gd5Si1.99Ge2Zn0.01 alloy and 278.5K in Gd5Si2Ge2 alloy respectively. The magnetocaloric effect of Gd5Si2Ge2 with the small addition of Zn is significantly improved.

Gd5Si2Ge2 Zn-dopping: Magnetocaloric effect

Xuezhen Wang Jie Xiang Zhi Zeng Xinghao Hu Xueling Hou Hui Xu

Institute of Materials Science, Shanghai University, Yanchang Road No.149,Shanghai 200072, China The Institute of Materials Science, Shanghai University, Yanchang Road No.149, Shanghai 200072, China Th

国际会议

11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)

青岛

英文

307-310

2010-09-25(万方平台首次上网日期,不代表论文的发表时间)