Transport and magnetic properties of Sr doped Nd0.55Ca0.45MnO3

被引：0
作者：
K. F. Wang
Y. Wang
Sh. Dong
X. Y. Yao
J. -M. Liu
机构：
[1] Nanjing University,Laboratory of Solid State Microstructures
[2] Chinese Academy of Sciences,International Center for Materials Physics
来源：
Journal of Electroceramics | 2008年 / 21卷
关键词：
Colossal magnetoresistance effect; Phase separation; Percolation behavior; 75.47.Lx; 75.47.Gk; 71.30.+h;
D O I：
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学科分类号：
摘要：
The effect of Sr doping on the transport and magnetism properties of charge/orbital-ordered Nd0.55Ca0.45MnO3 is investigated. A low temperature phase transition from a charge/orbital ordered insulator to a ferromagnetic metal was founded in the Nd0.55(Ca1−xSrx)0.45MnO3 samples. The ground state is the charge/orbital ordered insulator at x < 0.2, while for x > 0.3 it changes to a ferromagnetic metal. The resistivities of the samples exhibit almost ideal percolation behavior with a percolation threshold of 0.3. Therefore, this system shows an intricate competition between metallic ferromagnetism and charge/orbital ordered insulator and the percolation behavior demonstrates that the relative volumes of ferromagnetic phase and charge/orbital phases changes with the doping content x and temperature.
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页码：344 / 348
页数：4
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