Magnetoresistance in La1−xCaxMnO3 (0≤x<0.4) |
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| Authors: | G. LiT. Qian S.-J. FengF. Liu H.-D. ZhouX.-G. Li |
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| Affiliation: | a Structure Research Laboratory, Department of Materials Science and Engineering, University of Science and Technology of China, No. 96, Jinzhai Road, Hefei 230026, People's Republic of China
b International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110015, People's Republic of China |
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| Abstract: | The magnetic and transport properties of La1−xCaxMnO3 (0≤x<0.4) have been systematically studied. The magnetoresistance (MR) maximum appears at x=0.2-0.25 and the temperature dependence of MR for x>0.25 shows a much broader profile than that of samples for x=0.2-0.25. Based on a scenario in which there is a short-range charge ordering (CO) state coexisting in the ferromagnetic state matrix for x>0.25, and the least or even no short-range CO state exists in samples for x=0.2-0.25, the above observations can be understood. |
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| Keywords: | 75.47.Gk 75.47.Lx |
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