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
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
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%.
Received: 26 September 2002
Revised: 12 December 2002
Accepted manuscript online:
(Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))
Fund: 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).
Cite this article:
Li Yun-Bao (李云宝), Zhang Shao-Ying (张绍英), Yao Jin-Lei (姚金雷), Zhang Li-Gang (张立刚), Shen Bao-Gen (沈保根) Magnetic properties and magnetoresistance effect of Y1-xGdxMn6Sn6 (x=0－1) compounds 2003 Chinese Physics 12 328
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