Effect of High Resistance Phases on Metal-Insulator Transition of La0.67 Ca0.33 MnO3
XIA Zheng-Cai, YUAN Song-Liu, ZHANG Li-Jiang, ZHANG Guo-Hong, FENG Wen, TANG Jie, LIU Li, LIU Sheng, TANG Chao-Qun
Department of Physics, Huazhong University of Science and Technology, Wuhan 430074
Effect of High Resistance Phases on Metal-Insulator Transition of La0.67 Ca0.33 MnO3
XIA Zheng-Cai;YUAN Song-Liu;ZHANG Li-Jiang;ZHANG Guo-Hong;FENG Wen;TANG Jie;LIU Li;LIU Sheng;TANG Chao-Qun
Department of Physics, Huazhong University of Science and Technology, Wuhan 430074
关键词 ：
71.30.+h ,
75.30.Kz ,
75.30.Vn
Abstract ： The temperature dependence of resistivity ρ of YSZ doping composite of (1-x)La0.67 Ca0.33 MnO3 + xYSZ and Y2 O3 doping composite of (1-y)La0.67 Ca0.33 MnO3 + yY2 O3 is investigated, respectively, in a temperature range 77-300 K, where the YSZ represents yttria-stabilized zirconia (8 mol%Y2 O3 + 92 mol% ZrO2 ). Experimental results show that the YSZ doping level has important effects on both the metal-insulator (M-I) transition temperatures and zero field resistivity of the composites of (1-x)La0.67 Ca0.33 MnO3 + xYSZ. However, the Y2 O3 doping level has little effect on the M-I transition temperatures and the zero field resistivity of (1-y)La0.67 Ca0.33 MnO3 + yY2 O3 only increases slightly. The difference between the two types of composites may mainly result from the different distribution of high resistance phases at the grain boundaries and/or surfaces of La0.67 Ca0.33 MnO3 grains rather than the substitution of La3+ ions with Y3+ ions.
Key words ：
71.30.+h
75.30.Kz
75.30.Vn
出版日期: 2003-07-01
:
71.30.+h
(Metal-insulator transitions and other electronic transitions)
75.30.Kz
(Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))
75.30.Vn
引用本文:
XIA Zheng-Cai;YUAN Song-Liu;ZHANG Li-Jiang;ZHANG Guo-Hong;FENG Wen;TANG Jie;LIU Li;LIU Sheng;TANG Chao-Qun. Effect of High Resistance Phases on Metal-Insulator Transition of La0.67 Ca0.33 MnO3 [J]. 中国物理快报, 2003, 20(7): 1116-1119.
0.67 Ca0.33 MnO3 . Chin. Phys. Lett., 2003, 20(7): 1116-1119.
链接本文:
https://cpl.iphy.ac.cn/CN/
或
https://cpl.iphy.ac.cn/CN/Y2003/V20/I7/1116
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2003, Vol. 20 
