Electric current-induced giant electroresistance in epitaxial La0.67Sr0.33MnO3 thin films

被引：24

作者：

Sun, Y. H. ^{[1
]}

Zhao, Y. G. ^{[1
]}

Zhang, X. L. ^{[1
]}

Gao, S. N. ^{[1
]}

Lang, P. L. ^{[1
]}

Zhang, X. P. ^{[1
]}

Zhu, M. H. ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2007年 / 311卷 / 02期

基金：

高等学校博士学科点专项科研基金; 中国国家自然科学基金;

关键词：

La0.67Sr0.33MnO3; electroresistance; thin film; phase separation;

D O I：

10.1016/j.jmmm.2006.08.029

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The electronic transport behavior of La0.67Sr0.33MnO3 epitaxial thin films with different thicknesses has been investigated under various applied DC currents. The 20 and 70 nm thick films show a giant negative electroresistance (ER). In contrast, the films with 100 nm thickness show unusual giant positive ER, which can reach 30% with the current density of 1.8 x 10(8) A/cm(2) at room temperature. It is interesting that the electric current can also change the magnetoresistance of the films. The results were explained by considering the spin polarized current induced increase of ferromagnetic metallic phase and current-induced lattice distortion via electron wind force under high current density. (C) 2006 Elsevier B.V. All rights reserved.

引用

页码：644 / 650

页数：7

共 40 条

[1] Suppression of the metal-insulator transition temperature in thin La0.7Sr0.3MnO3 films [J].

Angeloni, M ;

Balestrino, G ;

Boggio, NG ;

Medaglia, PG ;

Orgiani, P ;

Tebano, A .

JOURNAL OF APPLIED PHYSICS, 2004, 96 (11) :6387-6392

[2] Intrinsic inhomogeneities in manganite thin films investigated with scanning tunneling spectroscopy [J].

Becker, T ;

Streng, C ;

Luo, Y ;

Moshnyaga, V ;

Damaschke, B ;

Shannon, N ;

Samwer, K .

PHYSICAL REVIEW LETTERS, 2002, 89 (23) :237203/1-237203/4

[3] Two-phase behavior in strained thin films of hole-doped manganites [J].

Biswas, A ;

Rajeswari, M ;

Srivastava, RC ;

Li, YH ;

Venkatesan, T ;

Greene, RL ;

Millis, AJ .

PHYSICAL REVIEW B, 2000, 61 (14) :9665-9668

[4] Strain-driven charge-ordered state in La0.67Ca0.33MnO3 -: art. no. 184424 [J].

Biswas, A ;

Rajeswari, M ;

Srivastava, RC ;

Venkatesan, T ;

Greene, RL ;

Lu, Q ;

de Lozanne, AL ;

Millis, AJ .

PHYSICAL REVIEW B, 2001, 63 (18)

[5] Mixed-valence manganites [J].

Coey, JMD ;

Viret, M ;

von Molnár, S .

ADVANCES IN PHYSICS, 1999, 48 (02) :167-293

[6] Current-induced giant electroresistance in La0.7Sr0.3MnO3 thin films -: art. no. 064412 [J].

Debnath, AK ;

Lin, JG .

PHYSICAL REVIEW B, 2003, 67 (06)

[7]

DICAPUA R, 2006, CONDMAT060523

[8] Current-induced metastable resistive state in epitaxial thin films of La1-xCaxMnO3 (x=0.2,0.3) -: art. no. 092504 [J].

Gao, J ;

Hu, FX .

APPLIED PHYSICS LETTERS, 2005, 86 (09) :1-3

[9] Current-induced effect on the resistivity of epitaxial thin films of La0.7Ca0.3MnO3 and La0.85Ba0.15MnO3 [J].

Gao, J ;

Shen, SQ ;

Li, TK ;

Sun, JR .

APPLIED PHYSICS LETTERS, 2003, 82 (26) :4732-4734

[10] Unusual current-induced electroresistance in epitaxial thin films of La0.8Ca0.2MnO3 -: art. no. 212413 [J].

Hu, FX ;

Gao, J .

PHYSICAL REVIEW B, 2004, 69 (21) :212413-1

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