X-Ray effects in charge-ordered manganites: a magnetic mechanism of persistent photoconductivity

被引：4

作者：

Keimer, B ^{[1
]}

Casa, D

Kiryukhin, V

Saleh, OA

Hill, JP

Tomioka, Y

Tokura, Y

机构：

[1] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA

[2] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

[3] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

[4] JRCAT, Tsukuba, Ibaraki 305, Japan

[5] Univ Tokyo, Dept Appl Phys, Tokyo 113, Japan

来源：

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY | 1999年 / 63卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

colossal magnetoresistance; persistent photoconductivity; hot electrons; X-ray diffraction;

D O I：

10.1016/S0921-5107(99)00048-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Charge-ordered manganites of composition Pr1-x(Ca1-ySry),MnO3 exhibit persistent photo-conductivity when illuminated by X-rays. We review transport and X-ray diffraction data as functions of X-ray exposure, magnetic field, and temperature which shed light on the origin of this unusual behavior. The experimental evidence suggests that the mechanism primarily involves a ferromagnetic polarization of local spins by hot electrons generated by the X-rays. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：30 / 35

页数：6

共 23 条

[1] CONSIDERATIONS ON DOUBLE EXCHANGE [J].