Transport-magnetism correlation and colossal magnetoresistance in mixed-valent manganites

Li Jianqing; Yuan Songliu

doi:10.1007/BF02838487

Journal of Wuhan University of Technology Materials Science Edition ›› 2005, Vol. 20 ›› Issue (2) : 49 -52. DOI: 10.1007/BF02838487

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Transport-magnetism correlation and colossal magnetoresistance in mixed-valent manganites

Li Jianqing ¹^,^a
, Yuan Songliu ²^,^b

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Abstract

A phenomenological model based on phase separation between ferromagnetic metallic and paramagnetic insulating domains was applied to analyze the electrical transport and colossal magnetoresistance for mixed-valent manganites of RE_2/3 AE_1/3 MnO₃. The results show that the model can yield results in agreement with experimental observations in these manganites. The present approach provides a simple picture to visualize the reason that the temperature dependence of resistance (with and without applied magnetic fields) in these compounds has the peculiar shape, without invoking any complicated concept.

Keywords

manganite perovskites / colossal magnetoresistance / magnetic transition

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Li Jianqing, Yuan Songliu. Transport-magnetism correlation and colossal magnetoresistance in mixed-valent manganites. Journal of Wuhan University of Technology Materials Science Edition, 2005, 20(2): 49-52 DOI:10.1007/BF02838487

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