Effects of substrate materials and annealing temperature on crystal structure and epitaxy of La0.7Sr0.3MnO3 films via dipping-pyrolysis process

被引：26

作者：

Manabe, T ^{[1
]}

Fujimoto, T ^{[1
]}

Yamaguchi, I ^{[1
]}

Kondo, W ^{[1
]}

Kojima, I ^{[1
]}

Mizuta, S ^{[1
]}

Kumagai, T ^{[1
]}

机构：

[1] Natl Inst Mat & Chem Res, Tsukuba, Ibaraki 305, Japan

来源：

THIN SOLID FILMS | 1998年 / 323卷 / 1-2期

关键词：

La0.7Sr0.3MnO3; films; crystal structure; epitaxy;

D O I：

10.1016/S0040-6090(97)01039-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Epitaxially grown La0.7Sr0.3MnO3 (LSMO) films were prepared on SrTiO3(001), LaAlO3(001) and MgO(001) single-crystal substrates by dipping-pyrolysis process. The fluctuation of alignments (mosaicity) of the films was evaluated based on X-ray diffraction 2 theta/theta scans, beta scans (pole figures) and asymmetric 2 theta/omega scans (reciprocal-space maps). Lattice types and epitaxy were examined in the films after heat treatment at 1473-1873 K; the lattice type of the films on SrTiO3 was pseudocubic, whereas those on LaAlO3 and MgO were pseudocubic or rhombohedral, depending on the heat-treatment temperature. A mosaic spread (Delta omega) of the LSMO film varied with the lattice-mismatch value between film and substrate. The LSMO films on SrTiO3 (lattice misfit approximate to 1%) showed high epitaxy with a low Delta omega (approximate to 0.50 degrees), whereas the films on MgO (misfit approximate to 8%) exhibited a larger Delta omega (approximate to 2.8 degrees). Also, surface morphology of the film was found to markedly depend on the kind of substrate materials and annealing temperature. (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：99 / 104

页数：6

共 13 条

[1] GROWTH OF LA-CA-MN-O FILMS BY OZONE-ASSISTED MOLECULAR-BEAM EPITAXY [J].