Persistent photoconductivity in La0.7CaxBa1-xMnO3 thin films

被引：9
作者：
Cauro, R
Grenet, JC
Gilabert, A
Medici, MG
机构：
[1] Univ Nice, LTE, CNRS, UMR 6595, F-06108 Nice, France
[2] Univ Nice, LPMC, CNRS, UMR 6622, F-06108 Nice, France
来源：
INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 1999年 / 13卷 / 29-31期
关键词：
D O I：
10.1142/S0217979299003933
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report, for the first time, experiments of persistent photoconductivity (PPC) in thin films of manganese perovskites La0.7Ca0.25Ba0.05MnO3 and La0.7Ca0.2Ba0.1MnO3 showing a persistent decrease of a few percent of the resistance after illumination with visible light. These persistent photoinduced effects are seen only in a range of low temperatures (< 25 K) well below the insulator-metal transition at respectively T-c=173 K and T-c=120 K. In this low temperature range, the transport mechanism is rather of activated hopping type regime.
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页码：3786 / 3791
页数：6
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