Influence of the Erbium Substitution for Gd in Gd5Si1.8Ge2.2Alloys on the Magnetocaloric Effect in Low-Field
来源期刊：JOURNAL OF RARE EARTHS2007年增刊第1期
论文作者：Zhuang Yinghong Chen Xiang Li Kefeng Ma Chunhua
Key words：(Gd1-xErx)5Si1.8Ge2.2 compounds; magnetocaloric effects; magnetic entropy changes; rare earths;
Abstract: The phases and magnetocaloric effect in the alloys (Gd1-xErx)5Si1.8Ge2.2 with x=0,0.1,0.2 and 0.3 were investigated by X-ray diffraction analysis and magnetization measurement. The samples were single phase with the monoclinic Gd5Si2Ge2-type structure. With the increase of Er content, the Curie temperature (Tc) decreased obviously from 253K of the alloy with x=0 to 114K with x=0.3. The maximum magnetic entropy changed in the samples of (Gd1-xErx)5Si1.8Ge2.2 with x=0.0,0.1,0.2 and 0.3 were 6.88,8.32,9.59 and 10.24 J·kg-1·K-1 respectively in the applied field change of 0~2.0T.
Zhuang Yinghong1，Chen Xiang1，Li Kefeng1，Ma Chunhua1
(1.Key laboratory of Nonferrous Metal Materials and New Processing Technology, Ministry of Education, Guangxi University, Nanning 530004, China)
Abstract:The phases and magnetocaloric effect in the alloys (Gd1-xErx)5Si1.8Ge2.2 with x=0,0.1,0.2 and 0.3 were investigated by X-ray diffraction analysis and magnetization measurement. The samples were single phase with the monoclinic Gd5Si2Ge2-type structure. With the increase of Er content, the Curie temperature (Tc) decreased obviously from 253K of the alloy with x=0 to 114K with x=0.3. The maximum magnetic entropy changed in the samples of (Gd1-xErx)5Si1.8Ge2.2 with x=0.0,0.1,0.2 and 0.3 were 6.88,8.32,9.59 and 10.24 J·kg-1·K-1 respectively in the applied field change of 0~2.0T.
Key words:(Gd1-xErx)5Si1.8Ge2.2 compounds; magnetocaloric effects; magnetic entropy changes; rare earths;
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