Mesoscopic Percolating Resistance Network in a Strained Manganite Thin Film

被引：182

作者：

Lai, Keji ^{[1
,2
]}

Nakamura, Masao ^{[3
,4
]}

Kundhikanjana, Worasom ^{[1
,2
]}

Kawasaki, Masashi ^{[3
,4
,5
]}

Tokura, Yoshinori ^{[3
,4
,6
]}

Kelly, Michael A. ^{[1
,2
]}

Shen, Zhi-Xun ^{[1
,2
]}

机构：

[1] Stanford Univ, Dept Phys, Geballe Lab Adv Mat, Stanford, CA 94305 USA

[2] Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA

[3] RIKEN, Adv Sci Inst, Cross Correlated Mat Grp CMRG, Wako, Saitama 3510198, Japan

[4] RIKEN, Adv Sci Inst, Correlated Electron Res Grp, Wako, Saitama 3510198, Japan

[5] Tohoku Univ, WPI Adv Inst Mat Res, Sendai, Miyagi 9808577, Japan

[6] Univ Tokyo, Dept Appl Phys, Tokyo 1138586, Japan

来源：

SCIENCE | 2010年 / 329卷 / 5988期

基金：

美国国家科学基金会; 日本学术振兴会;

关键词：

DOPED MANGANITES; PHASE-SEPARATION; TRANSITION; COEXISTENCE; FIELD;

D O I：

10.1126/science.1189925

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Many unusual behaviors in complex oxides are deeply associated with the spontaneous emergence of microscopic phase separation. Depending on the underlying mechanism, the competing phases can form ordered or random patterns at vastly different length scales. By using a microwave impedance microscope, we observed an orientation-ordered percolating network in strained Nd(1/2)Sr(1/2)MnO(3) thin films with a large period of 100 nanometers. The filamentary metallic domains align preferentially along certain crystal axes of the substrate, suggesting the anisotropic elastic strain as the key interaction in this system. The local impedance maps provide microscopic electrical information of the hysteretic behavior in strained thin film manganites, suggesting close connection between the glassy order and the colossal magnetoresistance effects at low temperatures.

引用

页码：190 / 193

页数：4

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