An X-Ray Induced Structural Transition in La0.875Sr0.125MnO3
Abstract
We report a synchrotron x-ray scattering study of the magnetoresistive manganite La0.875Sr0.125MnO3. At low temperatures, this material undergoes an x-ray induced structural transition at which charge ordering of Mn3+ and Mn4+ ions characteristic to the low-temperature state of this compound is destroyed. The transition is persistent but the charge-ordered state can be restored by heating above the charge-ordering transition temperature and subsequently cooling. The charge-ordering diffraction peaks, which are broadened at all temperatures, broaden more upon x-ray irradiation, indicating the finite correlation length of the charge-ordered state. Together with the recent reports on x-ray induced transitions in Pr(1-x)CaxMnO3, our results demonstrate that the photoinduced structural change is a common property of the charge-ordered perovskite manganites.
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