| Electrical & Applied Physics |
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| Study of transport behavior for Fe-doping La0.67Ca0.33MnO3 perovskite manganese |
| CUI Yu-jian, GE Hong-liang, HAN Yan-bing, JIA Guang-qiang, WANG Xin-yan, CAO Yi-gang, ZHANG Jin-cang |
| Department of Physics, China Institute of Metrology, Hangzhou 310018, China; Department of Physics, Shanghai University, Shanghai 200436, China; Department of Physics, Zhejiang University, Hangzhou 310027, China |
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Abstract Systematic studies of the transport properties of La0.67Ca0.33Mn1-xFexO3 (x=0-0.3) systems showed that with increasing Fe-doping content x the resistance increases and the insulator-metal transition temperature moves to lower temperature. For small doping content, the transport property satisfies metal transport behavior below the transition temperature, and above the transition temperature it satisfies the small polaron model. This behavior can be explained by Fe3+ doping, which easily forms Fe3+-O2--Mn4+ channel, suppressing the double exchange Mn3+-O2--Mn4+ channel and enhancing the spin scattering of Mn ions induced by antiferromagnetic clusters of Fe ions.
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Received: 16 September 2003
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