Abstract
The photo-induced resistance change has been observed in the La 2/3(Ca 1– x Sr x ) 1/3MnO 3 films with x = 0, 1/3 and 2/3 prepared by RF magnetron sputtering on the LaAlO 3 substrate. The photo-induced relative change in resistance increases initially with increasing temperature, followed by a decrease. The maximum values of the relative change in resistance decrease from 43.5 to 27.2% with increasing x, and the corresponding temperatures increase from 252 to 317 K. The intriguing mechanism of the photo-induced character and the effect of the Sr content in the perovskite films are discussed.
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