Fe3 O4 Segregation and Transport Properties of La0.67 Ca0.33 MnO3
ZHOU Qian-Xue1 , DAI Ming-Xing1 , WANG Ren-Hui1 , FENG Xin-Nan2 , WANG Yang2 , XIA Zheng-Cai2
1 Department of Physics, Wuhan University, Wuhan 430072
2 Department of Physics, Huazhong University of Science and Technology, Wuhan 430074
Fe3 O4 Segregation and Transport Properties of La0.67 Ca0.33 MnO3
ZHOU Qian-Xue1 ;DAI Ming-Xing1 ;WANG Ren-Hui1 ;FENG Xin-Nan2 ;WANG Yang2 ;XIA Zheng-Cai2
1 Department of Physics, Wuhan University, Wuhan 430072
2 Department of Physics, Huazhong University of Science and Technology, Wuhan 430074
关键词 ：
71.30.+h ,
75.30.Kz ,
75.30.Vn
Abstract ： Effect of Fe3 O4 segregation at grain boundaries on the electrical transport and magnetic properties of La0.67 Ca0.33 MnO3 is investigated. The experimental results show that the Fe3 O4 segregation not only shifts the paramagnetic--ferromagnetic transition temperature of La0.67 Ca0.33 MnO3 to a lower temperature region but also induces a new transition in a lower temperature region. Meanwhile, the transition processes observed in both the resistivity and magnetization curves are obviously widened. Compared to pure La0.67 Ca0.33 MnO3 , we assume that the Fe3 O4 segregation level at the grain boundaries can modify the electrical transport and magnetic properties of0.67 Ca0.33 MnO3 .
Key words ：
71.30.+h
75.30.Kz
75.30.Vn
出版日期: 2006-08-01
:
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:
ZHOU Qian-Xue;DAI Ming-Xing;WANG Ren-Hui;FENG Xin-Nan;WANG Yang;XIA Zheng-Cai. Fe3 O4 Segregation and Transport Properties of La0.67 Ca0.33 MnO3 [J]. 中国物理快报, 2006, 23(8): 2194-2197.
3 O4 Segregation and Transport Properties of La0.67 Ca0.33 MnO3 . Chin. Phys. Lett., 2006, 23(8): 2194-2197.
链接本文:
https://cpl.iphy.ac.cn/CN/
或
https://cpl.iphy.ac.cn/CN/Y2006/V23/I8/2194
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2006, Vol. 23 
