Magnetic properties and magnetocaloric effects in Tb6Co1.67Si3 compound
Shen Jun(沈俊)a)b)†, Wang Fang(王芳)a), Li Yang-Xian(李养贤)b), Sun Ji-Rong(孙继荣)a), and Shen Bao-Gen(沈保根)a)
a State Key Laboratory for Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China; b School of Material Science and Engineering, Hebei University of Technology, Tianjin 300130, China
Abstract Magnetic properties and magnetocaloric effects of Tb$_{6}$Co$_{1.67}$Si$_{3}$ have been investigated by magnetization measurement. This compound is of a hexagonal Ce$_{6}$Ni$_{2}$Si$_{3}$-type structure with a saturation magnetization of 187 emu/g at 5 K and a reversible second-order magnetic transition at Curie temperature $T_{\rm C} = 186$ K. A magnetic entropy change $\Delta S = 7$ J $\cdot$ kg$^{-1}$ $\cdot$ K$^{-1}$ is observed for a magnetic field change from 0 to 5 T. A large value of refrigerant capacity (RC) is found to be 330 J/kg for fields ranging from 0 to 5 T. The large RC, the reversible magnetization around $T_{\rm C}$ and the easy fabrication make the Tb$_{6}$Co$_{1.67}$Si$_{3}$ compound a suitable candidate for magnetic refrigerants in a corresponding temperature range.
(Magnetization curves, hysteresis, Barkhausen and related effects)
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 (Grant No KJCX2-YW-
Cite this article:
Shen Jun(沈俊), Wang Fang(王芳), Li Yang-Xian(李养贤), Sun Ji-Rong(孙继荣), and Shen Bao-Gen(沈保根) Magnetic properties and magnetocaloric effects in Tb6Co1.67Si3 compound 2007 Chinese Physics 16 3853
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