The Magentocaloric Effect of Gd₅Si₂Ge_2-XZn_X Alloy

Abstract:

The structural and magnetic properties of arc-melted alloys of Gd₅Si₂Ge_2-xZn_x in vacuum were investigated by powder x-ray diffraction and Vibrating Sample Magnetometer. When the addition amount of Zn substituted for Ge is less than or equal to 0.05, the alloys have monoclinic Gd₅Si₂Ge₂-type phase structure, the magnetic entropy change of Gd₅Si₂Ge_2-xZnx alloys rapidly increase, When x=0.05, the alloy has the excellent magnetic entropy change (|S_M|). When the addition amount of Zn substituted for Ge is more than 0.05, the alloys have the orthorhombic Gd₅Si₄-type phase structure, the magnetic entropy change of Gd₅Si_2-xGe_2-xZn_x alloys rapidly decreases. The Curie temperature (T_c) of Gd₅Si₂Ge_2-xZnx alloys linearly increases and the peak of |S_M| is broader with the Zn amount substituted for Ge in Gd₅Si₂Ge_2-xZn_x alloys in x range from 0-0.15.

• Periodical: Advanced Materials Research (Volumes 299-300)
• Pages: 525-529
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.299-300.525
• Online since: July 2011
• Authors: Xue Ling Hou, Jie Xiang, Zhi Zeng, Jian Huang, Xue Zhen Wang, Hui Xu
• Keywords: Gd₅Si₂Ge_2-XZn_X Alloy, Magnetocaloric Effect, Phase Formation

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