中国物理B ›› 2010, Vol. 19 ›› Issue (4): 47501-047501.doi: 10.1088/1674-1056/19/4/047501

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Effect of Dy substitution on magnetic properties and magnetocaloric effects of Tb6Co1.67Si3 compounds

李养贤1, 赵金良2, 沈俊3, 胡凤霞4, 孙继荣4, 沈保根4   

  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 of Magnetism, Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; (3)School of Material Science and Engineering, Hebei University of Technology, Tianjin 300130, China;Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China; (4)State Key Laboratory of Magnetism, Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 收稿日期:2009-11-30 修回日期:2010-01-18 出版日期:2010-04-15 发布日期:2010-04-15
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant No.~2006CB601101), the National Natural Science Foundation of China (Grant Nos.~50731007 and 10874223) and the Knowledge Innovation Project of the Chinese Academy of Sciences.

Effect of Dy substitution on magnetic properties and magnetocaloric effects of Tb6Co1.67Si3 compounds

Zhao Jin-Liang(赵金良)a)b)†, Shen Jun(沈俊)a)c), Li Yang-Xian(李养贤)a), Hu Feng-Xia(胡凤霞)b), Sun Ji-Rong(孙继荣)b), and Shen Bao-Gen(沈保根)b)   

  1. a School of Material Science and Engineering, Hebei University of Technology, Tianjin 300130, China; b State Key Laboratory of Magnetism, Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; c Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2009-11-30 Revised:2010-01-18 Online:2010-04-15 Published:2010-04-15
  • Supported by:
    Project supported by the National Basic Research Program of China (Grant No.~2006CB601101), the National Natural Science Foundation of China (Grant Nos.~50731007 and 10874223) and the Knowledge Innovation Project of the Chinese Academy of Sciences.

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摘要： The magnetic and magnetocaloric properties of (Tb$_{1 - x}$Dy$_{x})_{6}$Co$_{1.67}$Si3 ($0 \le x \le 0.8$) have been experimentally investigated. The compounds exhibit a Ce$_{6}$Ni2Si3-type hexagonal structure and undergo a second-order magnetic transition. The Curie temperature decreases from $\sim 187$~K to 142~K as the content of Dy grows from 0 to 0.8. The maximal magnetic entropy change, for a field change of 0--5~T, varies between $\sim 6.2$ and $\sim 7.4$~J/kg$\cdot$K, slightly decreasing when Dy is introduced. The substitution of Dy leads to a remarkable increase in refrigeration capacity (RC). A large RC value of $\sim 626$~J/kg is achieved for $x=0.4$ under a field change of 0--5~T.

Abstract: The magnetic and magnetocaloric properties of (Tb$_{1 - x}$Dy$_{x})_{6}$Co$_{1.67}$Si3 ($0 \le x \le 0.8$) have been experimentally investigated. The compounds exhibit a Ce$_{6}$Ni2Si3-type hexagonal structure and undergo a second-order magnetic transition. The Curie temperature decreases from $\sim 187$ K to 142 K as the content of Dy grows from 0 to 0.8. The maximal magnetic entropy change, for a field change of 0--5 T, varies between $\sim 6.2$ and $\sim 7.4$ J/kg$\cdot$K, slightly decreasing when Dy is introduced. The substitution of Dy leads to a remarkable increase in refrigeration capacity (RC). A large RC value of $\sim 626$ J/kg is achieved for $x=0.4$ under a field change of 0--5 T.

Key words: magnetic properties, magnetic entropy change, refrigerant capacity

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

  • 75.30.Sg
75.30.Kz (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)) 81.40.Rs (Electrical and magnetic properties related to treatment conditions)