Author： Kim Juho
Publisher： Taylor & Francis Ltd
ISSN： 0015-0193
Source： Ferroelectrics, Vol.336, Iss.1, 2006-01, pp. : 255-261
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Abstract
The SrTiO 3 /(Sr 1−x ,La x )TiO 3 (STO/SLTO) superlattices have been grown on stepped-SrTiO 3 substrate using laser-molecular beam epitaxy. The layer-by-layer growth was in-situ monitored by the intensity oscillation of specular spot in reflection high energy electron diffraction and also confirmed by atomic force microscopy image. A wide range of the lattice distortion of La modified SrTiO 3 (SLTO) layer was obtained in the STO/SLTO superlattices by varying the stacking sequence of STO and SLTO layers. The lattice strain of the SLTO layer was in the range of 1.008 to 1.021. We have fabricated successfully STO/SLTO superlattices, in which La defect is distributed in a regular manner of one dimension and the La containing layer experiences the wide range of the lattice distortion.
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