Dependence of carrier doping level on the photo control of (La, Sr)MnO3/SrTiO3 functional heterojunction

被引：32

作者：

Katsu, H ^{[1
]}

Tanaka, H ^{[1
]}

Kawai, T ^{[1
]}

机构：

[1] Osaka Univ, Inst Sci & Ind Res, Osaka 5670047, Japan

来源：

JOURNAL OF APPLIED PHYSICS | 2001年 / 90卷 / 09期

关键词：

D O I：

10.1063/1.1410328

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In a junction system which consists of ferromagnetic- (La1-xSrx)MnO3 and band insulating-SrTiO3, the double exchange ferromagnetism in the (La, Sr)MnO3 layer was controlled by light irradiation through photocarrier injection form SrTiO3. We investigated the dependence of hole doping level (Curie temperature) on the photo control of the (La, Sr)MnO3/SrTiO3 heterojunction. Whereas magnetization and conductivity of the heterojunction with T-C of 240 K is strongly reduced, including from metal-insulator transition, by light irradiation, that with T-C of 280 K cannot be modulated. This result indicates that phase boundary, between the metallic and insulating region on the (La1-xSrx)MnO3 phase diagram, plays an important role in photo carrier control of the functional heterojunction. (C) 2001 American Institute of Physics.

引用

页码：4578 / 4582

页数：5

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