Magnetic Properties and Magnetoresistance Effect of YMn6Sn6-xCrx (x = 0-0.8) Compounds
ZHANG Li-Gang1, LI Yun-Bao1, ZHANG Shao-Ying2, YAO Jin-Lei2,3, SHEN Bao-Gen2
1Department of Applied Physics, University of Science and Technology of Wuhan, Wuhan 430081
2State Key Laboratory for Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100080
3Department of Material Science and Engineering, Zhejiang University, Hangzhou 310027
Magnetic Properties and Magnetoresistance Effect of YMn6Sn6-xCrx (x = 0-0.8) Compounds
1Department of Applied Physics, University of Science and Technology of Wuhan, Wuhan 430081
2State Key Laboratory for Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100080
3Department of Material Science and Engineering, Zhejiang University, Hangzhou 310027
Abstract： The magnetic properties and magnetoresistance effect of
YMn6Sn6-xCrx (x = 0-0.8) compounds have been experimentally studied by magnetic properties and resistivity measurements in the applied field range 0-5 T. The compound (x = 0.8) displays the ferromagnetic behaviour, while the compounds (x = 0-0.4) display the antiferromagnetic behaviour in the whole ordering temperature range. The compounds (x = 0.5, 0.6) experienced a transition from an antiferromagnetic state to ferromagnetic one with increasing temperature. The compound with x = 0.8 is rapidly saturated in the lower magnetic field with saturation magnetization of 35.92 emu/g. The compounds (x = 0-0.6) display a field induced metamagnetic transition, and the threshold fields decrease with increasing Cr content. The cell-volume V of compounds (x = 0-0.8) increases, and the ordering temperature decreases with the increasing Cr content. A large magnetoresistance effect was observed for the compounds (x = 0.4, 0.5), and the maximum absolute value at 5 K are 32% and 24% under 5 T for x = 0.4 and x = 0.5, respectively.
2002, Vol. 19 
