Abstract
Systematic studies of the transport properties of La0.67Ca0.33Mn1−xFe x O3 (x=0–0.3) systems showed that with increasing Fe-doping contentx 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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Project supported by the National Natural Science Foundation of China (No. 10274049), Foundation of the Natural Science of Zhejiang Province (Nos. RC015056 and 502122), Science & Technology Development Foundation of the Education Committee of Shanghai Municipality (No. 02AK42), and the Shanghai Leading Academic Discipline Program (No. 01A16)
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Cui, Yj., Ge, Hl., Han, Yb. et al. Study of transport behavior for Fe-doping La0.67Ca0.33MnO3 perovskite manganese. J. Zheijang Univ.-Sci. 5, 603–608 (2004). https://doi.org/10.1631/jzus.2004.0603
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DOI: https://doi.org/10.1631/jzus.2004.0603