中国物理B ›› 2003, Vol. 12 ›› Issue (3): 328-331.doi: 10.1088/1009-1963/12/3/315

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Magnetic properties and magnetoresistance effect of Y1-xGdxMn6Sn6 (x=0－1) compounds

李云宝1, 张立刚1, 张绍英2, 沈保根2, 姚金雷3   

  1. (1)Department of Applied Physics, University of Science and Technology of Wuhan, Wuhan 430081, China; (2)State Key Laboratory for Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China; (3)State Key Laboratory for Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China; Department of Material Science and Engineering, Zhejiang University, Hangzhou 310027, China
  • 收稿日期:2002-09-26 修回日期:2002-12-12 出版日期:2003-03-16 发布日期:2005-03-16
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 50071041), and by the State Key Program of Basic Research of China (Grant No 50071041).

Magnetic properties and magnetoresistance effect of Y1-xGdxMn6Sn6 (x=0－1) compounds

Li Yun-Bao (李云宝)a, Zhang Shao-Ying (张绍英)b, Yao Jin-Lei (姚金雷)bc, Zhang Li-Gang (张立刚)a, Shen Bao-Gen (沈保根)b   

  1. a Department of Applied Physics, University of Science and Technology of Wuhan, Wuhan 430081, China; b State Key Laboratory for Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China; c Department of Material Science and Engineering, Zhejiang University, Hangzhou 310027, China
  • Received:2002-09-26 Revised:2002-12-12 Online:2003-03-16 Published:2005-03-16
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 50071041), and by the State Key Program of Basic Research of China (Grant No 50071041).

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摘要： The magnetic properties and magnetoresistance effect of Y1-xGdxMn6Sn6 (x=0－1) compounds have been investigated by magnetization and resistivity measurements in the applied field range (0－5 T). Compounds with x=0.4－1 display ferrimagnetic behaviours in the whole magnetic ordering temperature range, while compounds with x=0－0.2 display a field-induced metamagnetic transition, and the threshold fields decrease with increasing Gd content. The compounds with x=0.1－0.2 undergo an antiferromagnetic to ferromagnetic transition with increasing temperature. The cell-parameter a and c and cell-volume V of compounds (x=0－1) increase with increasing Gd content. It was found that the saturation magnetization M_s of the compounds (x=0.4－1) decreases, while the ordering points of the compounds (x=0－1)increase with increasing Gd content. A large MR effect was observed in the compound with x=0.2, and the maximum absolute value of MR at 5 K under 3 T is close to 19.3%.

Abstract: The magnetic properties and magnetoresistance effect of Y1-xGdxMn6Sn6 (x=0－1) compounds have been investigated by magnetization and resistivity measurements in the applied field range (0－5 T). Compounds with x=0.4－1 display ferrimagnetic behaviours in the whole magnetic ordering temperature range, while compounds with x=0－0.2 display a field-induced metamagnetic transition, and the threshold fields decrease with increasing Gd content. The compounds with x=0.1－0.2 undergo an antiferromagnetic to ferromagnetic transition with increasing temperature. The cell-parameter a and c and cell-volume V of compounds (x=0－1) increase with increasing Gd content. It was found that the saturation magnetization Ms of the compounds (x=0.4－1) decreases, while the ordering points of the compounds (x=0－1)increase with increasing Gd content. A large MR effect was observed in the compound with x=0.2, and the maximum absolute value of MR at 5 K under 3 T is close to 19.3%.

Key words: Y1-xGdxMn6Sn6 compounds, magnetic properties, metamagnetic transition, magnetore-sistance effect

中图分类号:  (Metals and alloys)

  • 75.47.Np
75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects) 75.40.Cx (Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.)) 75.30.Kz (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))