Structure and microstructure of La1-xSrxMnO3 (x ≈ 0.16) films grown on a SrTiO3 (110) substrate

被引：0
|
作者：
Lebedev, OI
Verbeeck, J
Van Tendeloo, G
Amelinckx, S
Razavi, FS
Habermeier, HU
机构：
[1] Univ Antwerp, Rijksuniv Ctr Antwerp, EMAT, B-2020 Antwerp, Belgium
[2] Brock Univ, Dept Phys, St Catharines, ON L2S 3A1, Canada
[3] Max Planck Inst Festkoerperforsch, D-70506 Stuttgart, Germany
来源：
PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES | 2001年 / 81卷 / 12期
关键词：
D O I：
10.1080/01418610108217170
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The interface between La1-xSrxMnO3 (LSMO) epitaxial films grown by pulsed-laser deposition on the (110) surface of a SrTiO3 single-crystal substrate has been investigated by high-resolution electron microscopy and by electron-energy-loss spectroscopy. The structure of the LSMO films is rhombohedral, a pseudocubic distortion of the perovskite structure. The films show microtwinning, which apparently acts as a mechanism of misfit strain relaxation without a need for the formation of interfacial dislocations. The interface exhibits corrugations formed by mutually perpendicular microfacets parallel to the cubic planes of the pseudocubic structure. Within the LSMO film, close to the interface, inclusions are formed; their lattice is coherent with that of the surrounding LSMO matrix. Energy-electron-loss spectroscopy suggests that the inclusions are lanthanum rich. A film growth scenario compatible with the observed phase separation is proposed.
引用
收藏
页码：2865 / 2884
页数：20
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