Ordering in (La,Sr)(Al,Ta)O3 substrates

Publication Type
Journal Article
Authors
DOI
10.1557/JMR.2003.0233
Abstract
(La, Sr)(Al, Ta)O3 (LSAT) has recently received increased attention as a substrate for the deposition of various oxide films. LSAT is usually considered as having a perovskite structure. However, the exact atomic structure of LSAT is not yet well known and has received little attention up to now. In this paper, a series of studies using x-ray diffraction, transmission electron microscopy, and energy dispersive spectrometry were conducted to determine the atomic structure of LSAT. It was found that LSAT consists of two types of domains: one with a simple cubic perovskite structure (disordered with a = 0.3868 nm) and the other with a face-centered-cubic structure (ordered with a = 0.773 nm). Computer image simulation of high-resolution lattice images suggests that the ordered structure is due to ordering of the Al and Ta ions.
Notes
cited By 16
Journal
Journal of Materials Research
Volume
18
Year of Publication
2003
Number
7
Pagination
1698-1704
Publisher
Materials Research Society
ISSN Number
08842914
Keywords
Research Areas
Download citation