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Electrical and magnetic properties of non-stoichiometric (La0.8Sr0.2)1−xMnO3 perovskites |
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| Authors: | JY Yu SY Zhang GH Liu L Wang |
| Institution: | a Department of Mathematics and Physics, Anhui Institute of Architecture and Industry, Hefei 230022, China b National Laboratory of Solid State Microstructures, Nanjing University, Nanjing, 210093, China c Department of Physics, Nanjing University, Nanjing, 210093, China d Department of Environmental Engineering, Anhui Institute of Architecture and Industry, Hefei 230022, China |
| Abstract: | The structure, transport and magnetic properties of (La0.8Sr0.2)1−xMnO3 (0≤x≤0.30) polycrystalline perovskite manganites have been investigated. For all the samples the Curie temperatures, Tc, remain nearly unchanged (329±3 K). Resistivity versus temperature curves for the samples show a double-peak behavior. A significant magnetoresistance (MR) effect and different temperature dependences of the MR ratios of the samples are observed. The shapes of the MR-T curves of the samples can be adjusted by changing x. For the x=0.30 sample, a nearly constant MR ratio of (9.5±0.5)% is obtained over the temperature range from 205 to 328 K. |
| Keywords: | 72 20 My 75 30 Kz 75 70 Pa 74 25 Fy |
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