Transmission electron microscopy of La0.7Ca0.3MnO3 thin films

被引：20

作者：

Arita, M ^{[1
]}

Sasaki, A

Hamada, K

Okada, A

Hayakawa, J

Asano, H

Matsui, M

Takahashi, H

机构：

[1] Hokkaido Univ, Grad Sch Engn, Sapporo, Hokkaido 0608628, Japan

[2] Nagoya Univ, Grad Sch Engn, Nagoya, Aichi 4648603, Japan

[3] Hokkaido Univ, Ctr Adv Res Energy Technol, Sapporo, Hokkaido 0608628, Japan

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2000年 / 211卷 / 1-3期

关键词：

high-resolution TEM; colossal magnetoresistance; thin film; epitaxy;

D O I：

10.1016/S0304-8853(99)00717-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

La0.7Ca0.3MnO3 (LCMO) films grown on (0 0 1) surfaces of various (pseudo-) cubic substrates, MgO, SrTiO3, LaSrGaO4 and YAlO3, were studied by means of transmission electron microscopy. In all cases, the (0 0 1) plane of LCMO perovskite primitive cell is parallel to the substrate surface. The film on SrTiO3 showed the single-variant structure with many twin boundaries while the films on other substrates had the three-variant structure where three [0 1 0] axes of the orthorhombic unit cell are perpendicular to each other. The LCMO cell on SrTiO3 was expanded by about 1% in the film plane and shrank by about 1% out of the plane. Many planar defects and intergrown grains were observed in the film on MgO. They originated at the substrate surface. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：84 / 90

页数：7

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