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)
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
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.
Received: 14 December 2007
Revised: 06 March 2008
Accepted manuscript online:
Fund: 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
Cite this article:
Shen Jun(沈俊), Li Yang-Xian(李养贤), Dong Qiao-Yan(董巧燕), Wang Fang(王芳), and Sun Ji-Rong(孙继荣) Magnetocaloric effect in Gd6Co1.67Si3 compound with a second-order phase transition 2008 Chin. Phys. B 17 2268
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