Photoexcitation and transport characteristics in doped manganite thin films

被引：6

作者：

Hao, JH

He, GG

Lu, DX

Wong, HK

机构：

[1] Huazhong Univ Sci & Technol, Dept Optoelect Engn, Wuhan 430074, Peoples R China

[2] Chinese Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China

来源：

MATERIALS LETTERS | 2000年 / 46卷 / 04期

基金：

中国国家自然科学基金;

关键词：

La manganite; photoexcitation; transport; phase transition; colossal magnetoresistance; relaxation; magnetic thin films; oxygen content;

D O I：

10.1016/S0167-577X(00)00175-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The photoinduced change of the transport characteristic in(La,Ca)MnOdelta thin films was observed under illumination with visible light. The transition temperature T-c in oxygen deficient thin films increases with increasing right intensity. The photoinduced effect in fully oxidized thin films is in sharp contrast to that observed in the oxygen deficient samples. This effect relaxes back within several days at room temperature. We suggest that a novel photodoping effect may exist in doped manganites. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

收藏

页码：225 / 228

页数：4

相关论文

共 11 条

[1] Enhancement of persistent photoconductivity by uv excitation in GdBa2CU3O6.3 [J].

Endo, T ;

Hoffmann, A ;

Santamaria, J ;

Schuller, IK .

PHYSICAL REVIEW B, 1996, 54 (06) :R3750-R3752

[2] Optical response of single-crystal (La,Ca)MnO delta thin films [J].

Hao, JH ;

Zeng, XT ;

Wong, HK .

JOURNAL OF APPLIED PHYSICS, 1996, 79 (03) :1810-1812

[3] LATTICE EFFECTS ON THE MAGNETORESISTANCE IN DOPED LAMNO3 [J].

HWANG, HY ;

CHEONG, SW ;

RADAELLI, PG ;

MAREZIO, M ;

BATLOGG, B .

PHYSICAL REVIEW LETTERS, 1995, 75 (05) :914-917

[4] THOUSANDFOLD CHANGE IN RESISTIVITY IN MAGNETORESISTIVE LA-CA-MN-O FILMS [J].

JIN, S ;

TIEFEL, TH ;

MCCORMACK, M ;

FASTNACHT, RA ;

RAMESH, R ;

CHEN, LH .

SCIENCE, 1994, 264 (5157) :413-415

[5] DEPENDENCE OF GIANT MAGNETORESISTANCE ON OXYGEN STOICHIOMETRY AND MAGNETIZATION IN POLYCRYSTALLINE LA0.67BA0.33MNOZ [J].

JU, HL ;

GOPALAKRISHNAN, J ;

PENG, JL ;

LI, Q ;

XIONG, GC ;

VENKATESAN, T ;

GREENE, RL .

PHYSICAL REVIEW B, 1995, 51 (09) :6143-6146

[6] PERSISTENT PHOTOCONDUCTIVITY IN YBA2CU3O6+X FILMS AS A METHOD OF PHOTODOPING TOWARD METALLIC AND SUPERCONDUCTING PHASES [J].

KUDINOV, VI ;

CHAPLYGIN, IL ;

KIRILYUK, AI ;

KREINES, NM ;

LAIHO, R ;

LAHDERANTA, E ;

AYACHE, C .

PHYSICAL REVIEW B, 1993, 47 (14) :9017-9028

[7] Colossal magnetoresistance properties of the manganese perovskites La0.7-xYxCa0.3MnO3-delta [J].

Maignan, A ;

Simon, C ;

Caignaert, V ;

Raveau, B .

JOURNAL OF APPLIED PHYSICS, 1996, 79 (10) :7891-7895

[8]

MORITOMO Y, 1995, PHYS REV B, V51, P1649

[9] PHOTOINDUCED ENHANCEMENT OF SUPERCONDUCTIVITY [J].

NIEVA, G ;

OSQUIGUIL, E ;

GUIMPEL, J ;

MAENHOUDT, M ;

WUYTS, B ;

BRUYNSERAEDE, Y ;

MAPLE, MB ;

SCHULLER, IK .

APPLIED PHYSICS LETTERS, 1992, 60 (17) :2159-2161

[10] PHOTOEXCITATION AND OXYGEN ORDERING IN YBA2CU3OX FILMS [J].

OSQUIGUIL, E ;

MAENHOUDT, M ;

WUYTS, B ;

BRUYNSERAEDE, Y .

PHYSICAL REVIEW B, 1994, 49 (05) :3675-3678