摘要
采用射频磁控溅射法制备了 Ca、Sr双掺杂La2/3(Ca1/3 Sr2/3)1/3 MnO3 (LCSMO)薄膜。电阻率 温度特性表明,薄膜在 387K时发生铁磁金属相 顺磁非导体相相变。同时测试了薄膜在 180,230 和 280K温度下的伏安特性,表明所制备的薄膜具有负阻效应,并分析了产生该现象的原因。
Double-doped perovskite thin film of La2/3 (Ca1/3Sr2/3)1/3MnO3 (LCSMO) has been prepared with RF magnetron sputtering method. We have observed a metal-to-insulator (M-I) transition in this film at 387 K as increasing its temperature. The voltage-current characteristics of the film at 180 K, 230 K and 280 K indicate that the thin film has the negative resistance effect. These phenomena were qualitatively explained by the double exchange model and the Jahn-Teller effect.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2005年第1期37-39,共3页
Journal of Functional Materials
基金
国家自然基金资助项目(60171043)
陕西省自然基金资助项目(2001C21)
西北工业大学博士生创新基金资助项目(2003323)
关键词
钙钛矿结构
负阻效应
双交换作用
小极化子
Jahn
Teller效应
Colossal magnetoresistance
Current voltage characteristics
Magnetron sputtering
Manganese compounds
Metal insulator transition
Negative resistance
Perovskite
Rare earth additions
Transport properties
