Phase separation and enhanced magnetoresistance in the strained epitaxial La0.625Ca0.375MnO3 (001) films

被引：7

作者：

Han, Yunxin ^{[1
]}

Wu, Wenbin ^{[2
]}

Jiang, Guoshun ^{[1
]}

Zhu, Changfei ^{[1
]}

机构：

[1] Univ Sci & Technol China, Dept Mat Sci & Engn, CAS Key Lab Energy Convers Mat, Hefei 230026, Peoples R China

[2] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2012年 / 111卷 / 06期

关键词：

MANGANITES;

D O I：

10.1063/1.3695376

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

La0.625Ca0.375MnO3 films have been epitaxially grown on the (LaAlO3)(0.3)(Sr2AlTaO6)(0.35) (001) substrates at different oxygen pressures and show varying tetragonal distortion. Results indicate a tendency that larger tetragonal distortion can stabilize the antiferromagnetic-insulator phase in the thin films. Colossal magnetoresistance (CMR) and anisotropic magnetoresistance (AMR) have been greatly enhanced only in the strained films over a broad temperature, probably responding to the anisotropic fluctuation of the nanoscale orientation-ordered patterns near the temperature of the phase separation region or metal-insulator transition. Hence, the inhomogeneous phase competition may contribute to the CMR and the extraordinary AMR effect for manganite devices. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3695376]

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