Interface effect and its doping dependence in La1-xSrxMnO3/SrTiO3 supertattices

被引：38

作者：

Izumi, M ^{[1
]}

Ogimoto, Y

Manako, T

Kawasaki, M

Tokura, Y

机构：

[1] Joint Res Ctr Atom Technol, Tsukuba, Ibaraki 3050046, Japan

[2] Univ Tokyo, Adv Sci & Technol Res Ctr, Tokyo 1538904, Japan

[3] Natl Inst Adv Ind Sci & Technol, AIST, Correlated Electron Res Ctr, Tsukuba, Ibaraki 3058562, Japan

[4] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

[5] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2002年 / 71卷 / 11期

关键词：

CMR; superlattice; interface; tunnel junction;

D O I：

10.1143/JPSJ.71.2621

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have investigated the interface effect on magnetic and transport properties in the superlattices composed of ferromagnetic La1-xSrMnO3 (LSMO) and non magnetic SrTiO3 (STO) (x = 0.2,03, and 0.4). The interface of LSMO with STO was proved to show spin-canting, the degree of which critically depends on the doping level x and the layer thickness (t(LSMO)) of LSMO. Large magnetoresistance subsisting at low temperature appears in the superlattices with specific sets of (x, t(LSMO)) parameters that shows a metal-insulator crossover behavior with appreciable spin-canting. Implications of the present results in the tunneling magnetoresistance for the LSMO/STO/LSMO junction are also discussed.

引用

页码：2621 / 2624

页数：4

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