摘要
用磁控溅射方法制备了钙钛矿锰氧化合物La2/3Sr1/3MnO3(LSMO)单晶外延薄膜,该薄膜发生顺磁绝缘-铁磁金属相变的转变温度Tc≈330K。在室温(T=293K),偏置电流对LSMO薄膜输运性质的影响表明,随着电流的增大,材料的晶格畸变加强,电阻值增大,同时薄膜的激光反射率减小。用固体光学理论对其进行定性解释。
The La2/3Sr1/3MnO thin film was prepared by magnetron sputtering method. The temperature dependence of resistance curve indicated that the Curie temperature was about 330K. At room temperature （293K） the bias current induced increase of the lattice distortion gives rise to the resistance of the thin film. The reversible change of reflectivity from perovskite manganite thin film by bias current were observed. The result provides a possibility use in optical devices.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2006年第7期1049-1050,1053,共3页
Journal of Functional Materials
基金
国家自然科学基金重点资助项目(50331040)
国家自然科学基金资助项目(60171034)
关键词
LSMO薄膜
反射率
晶格畸变
LSMO thin film
reflectivity
lattice distortion
