中国物理B ›› 2008, Vol. 17 ›› Issue (6): 2268-2271.doi: 10.1088/1674-1056/17/6/055

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Magnetocaloric effect in Gd6Co1.67Si3 compound with a second-order phase transition

李养贤1, 沈俊2, 董巧燕3, 王芳3, 孙继荣3   

  1. (1)School of Material Science and Engineering, Hebei University of Technology, Tianjin 300130, China; (2)School of Material Science and Engineering, Hebei University of Technology, Tianjin 300130, China;State Key Laboratory for Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; (3)State Key Laboratory for Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 收稿日期:2007-12-14 修回日期:2008-03-06 出版日期:2008-06-20 发布日期:2008-06-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 50571112 and 50731007), the National Basic Research Program of China (Grant No 2006CB601101) and the Basic Research Program of Chinese Academy of Sciences, China (Grant No KJ

Magnetocaloric effect in Gd6Co1.67Si3 compound with a second-order phase transition

Shen Jun(沈俊)a)b), Li Yang-Xian(李养贤)a)†, Dong Qiao-Yan(董巧燕)b), Wang Fang(王芳)b), 　 and Sun Ji-Rong(孙继荣)b)   

  1. a School of Material Science and Engineering, Hebei University of Technology, Tianjin 300130, China; b State Key Laboratory for Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2007-12-14 Revised:2008-03-06 Online:2008-06-20 Published:2008-06-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 50571112 and 50731007), the National Basic Research Program of China (Grant No 2006CB601101) and the Basic Research Program of Chinese Academy of Sciences, China (Grant No KJ

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摘要： The magnetic properties and the magnetic entropy change \Delta S have been investigated for Gd6Co1.67Si3 compounds with a second-order phase transition. The saturation moment at 5K and the Curie temperature TC are 38.1\muB and 298K, respectively. The \Delta S originates from a reversible second-order magnetic transition around TC and its value reaches 5.2J/kg.K for a magnetic field change from 0 to 5T. The refrigerant capacity (RC) of Gd6Co1.67Si3 are calculated by using the methods given in Refs.[12] and [21], respectively, for a field change of 0--5T and its values are 310 and 440\,J/kg, which is larger than those of some magnetocaloric materials with a first-order phase transition.

关键词: Gd6Co1.67Si3 compound, magnetic properties, magnetic entropy change

Abstract: The magnetic properties and the magnetic entropy change $\Delta S$ have been investigated for Gd6Co1.67Si3 compounds with a second-order phase transition. The saturation moment at 5K and the Curie temperature TC are 38.1$\mu$B and 298K, respectively. The $\Delta S$ originates from a reversible second-order magnetic transition around TC and its value reaches 5.2J/kg$\cdot$K for a magnetic field change from 0 to 5T. The refrigerant capacity (RC) of Gd6Co1.67Si3 are calculated by using the methods given in Refs.[12] and [21], respectively, for a field change of 0--5T and its values are 310 and 440 J/kg, which is larger than those of some magnetocaloric materials with a first-order phase transition.

Key words: Gd6Co1.67Si3 compound, magnetic properties, magnetic entropy change

中图分类号:  (Magnetocaloric effect, magnetic cooling)

  • 75.30.Sg
65.40.G- (Other thermodynamical quantities) 75.30.Cr (Saturation moments and magnetic susceptibilities) 75.30.Kz (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)) 75.50.-y (Studies of specific magnetic materials)