Giant negative photoresistance of epitaxial manganite La_(2/3)Ca_(1/3)MnO_(3-δ) film  

作　　者：XI JianFeng ZHAO Kun NI Hao XIANG WenFeng FENG Xin SUN Qi LU ZhiQing XIAO LiZhi 

机构地区：[1]State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum [2]Beijing Key Laboratory of Optical Detection Technology for Oil and Gas, China University of Petroleum

出　　处：《Science China Chemistry》2015年第12期200-206,共7页中国科学（化学英文版）

基　　金：supported by National Basic Research Program of China(973 Program)(Grant No.2014CB7443-02);Specially Founded Program on National Key Scientific Instruments and Equipment Development(Grant No.2012YQ140005)

摘　　要：The La2/3Cal/3Mn03_σ film has been deposited on the （001） SrTiO3 substrate and its temper- ature-dependent photoconductive properties have been investigated from 80 to 300 K. The La2/3Cal/3MnO3-σ film has a novel photoelectric property due to its oxygen-deficient structure. We observed laser-induced giant negative photoresistance of the sample in a wide temperature range. The change rate of negative photoresistance was nearly 100% at the low temperature when the sample was irradiated by 532 nm laser. In addition, this effect was sensitive to the power of laser irradiation. The oxygen-deficiency of La2/3Cal/3Mn03-σ film seems to have an impact on the laser-induced resistance variation. The experimental results made the La2/3Cal/3MnO3_σ film a promising application as a photoswitch device.The La2/3Ca1/3Mn O3-δ film has been deposited on the(001) Sr Ti O3 substrate and its temperature-dependent photoconductive properties have been investigated from 80 to 300 K. The La2/3Ca1/3Mn O3-δfilm has a novel photoelectric property due to its oxygen-deficient structure. We observed laser-induced giant negative photoresistance of the sample in a wide temperature range. The change rate of negative photoresistance was nearly 100% at the low temperature when the sample was irradiated by 532 nm laser. In addition, this effect was sensitive to the power of laser irradiation. The oxygen-deficiency of La2/3Ca1/3Mn O3-δfilm seems to have an impact on the laser-induced resistance variation. The experimental results made the La2/3Ca1/3Mn O3-δfilm a promising application as a photoswitch device.

关 键 词：giant negative photoresistance oxygen-deficient PHOTOSWITCH thin film manganite oxide 

分 类 号：TQ174.758[化学工程—陶瓷工业] TN361[化学工程—硅酸盐工业]