Magnetic Properties and Magnetoresistance of HfFe6Ge6-Type Er1-xGdxMn6Ge6 and Ho1-xGdxMn6Ge6 (0.2 ≤ x ≤ 0.9) Compounds
ZHANG Li-Gang1, WANG Ru-Wu1,2, LI-Lu1, 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 of Magnetism, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080
3State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027
Magnetic Properties and Magnetoresistance of HfFe6Ge6-Type Er1-xGdxMn6Ge6 and Ho1-xGdxMn6Ge6 (0.2 ≤ x ≤ 0.9) Compounds
1Department of Applied Physics, University of Science and Technology of Wuhan, Wuhan 430081
2State Key Laboratory of Magnetism, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080
3State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027
Abstract： Magnetic properties and magnetoresistance effects of the Er1-xGdxMn6Ge6 and Ho1-xGdxMn6Ge6 (0.2 ≤ x ≤ 0.9) compounds have been studied by magnetic property and resistivity measurements in applied magnetic field up to 5 T. For increasing Gd content, two series display a transition from the antiferromagnetic state to the ferrimagnetic state. The Er1-xGdxMn6Ge6(x = 0.2 and 0.5) and Ho1-xGdxMn6Ge6 (x = 0.2 and 0.4) compounds order antiferromagnetically at 430, 432, 423 and 425 K, respectively. The Er1-xGdxMn6Ge6 (x = 0.8 and 0.9) and Ho1-xGdxMn6Ge6 (x = 0.7, 0.8 and 0.9) compounds order ferrimagnetically at 462, 471, 450, 463 and 470 K, respectively. The Er1-xGdxMn6Ge6 and Ho1-xGdxMn6Ge6 compounds undergo the second transitions below 71 and 82 K, respectively. The magnetoresistance curves of the Er0.1Gd0.9Mn6Ge6 and Ho0.1Gd0.9Mn6Ge6 compounds in a field of 5 T are presented and the magnetoresistance effects are related to the metamagnetic transitions.
ZHANG Li-Gang;WANG Ru-Wu;LI-Lu;ZHANG Shao-Ying;YAO Jin-Lei;SHEN Bao-Gen. Magnetic Properties and Magnetoresistance of HfFe6Ge6-Type Er1-xGdxMn6Ge6 and Ho1-xGdxMn6Ge6 (0.2 ≤ x ≤ 0.9) Compounds[J]. 中国物理快报, 2003, 20(6): 915-918.
ZHANG Li-Gang, WANG Ru-Wu, LI-Lu, ZHANG Shao-Ying, YAO Jin-Lei, SHEN Bao-Gen. Magnetic Properties and Magnetoresistance of HfFe6Ge6-Type Er1-xGdxMn6Ge6 and Ho1-xGdxMn6Ge6 (0.2 ≤ x ≤ 0.9) Compounds. Chin. Phys. Lett., 2003, 20(6): 915-918.
2003, Vol. 20 
