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The current-induced effect on the Jahn-Teller distortion in the La0.5Ca0.5MnO3 manganite |
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| Authors: | Y.Q. Ma J. Yang B.C. Zhao W.J. Lu Y.P. Sun |
| Affiliation: | a Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, People's Republic of China b National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, People's Republic of China |
| Abstract: | The influence of dc current on the resistivity ρ and the Young's modulus E of La0.5Ca0.5MnO3 compound has been investigated by means of an in situ measuring method. At low temperatures, both the resistivity ρ and the relative modulus ΔE increase with the current. A relaxation behavior of ρ to the higher resistive state is observed at a fixed temperature and a constant current. After storing the sample for a few days, ρ decreases with the current, accompanying a slight drop of ΔE at low temperatures. Current-induced effects on ρ and ΔE are interpreted according to the current-induced interwinning of Mn3+O6 octahedral distortion modes between Q2- and Q3-types, which is suggested to contribute to the variation of the resistivity. |
| Keywords: | 75.30.Kz 71.30.+h |
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