TY - JOUR
KW - Deposition
KW - Thin films
KW - Transmission electron microscopy
KW - Ions
KW - Oxides
KW - Substrates
KW - Oxide films
KW - Lanthanum compounds
KW - Computer simulation
KW - X-ray Diffraction
KW - Crystal lattices
KW - Molecular structure
KW - Crystal atomic structure
KW - Spectrometers
KW - Cubic face centered cubic structure
KW - Energy dispersive spectrometry
KW - High resolution lattice images
KW - Perovskite structure
AU - H Li
AU - L Salamanca-Riba
AU - Ramamoorthy Ramesh
AU - J.H Scott
AB - (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.
BT - Journal of Materials Research
DO - 10.1557/JMR.2003.0233
LA - eng
M1 - 7
N1 - cited By 16
N2 - (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.
PB - Materials Research Society
PY - 2003
SP - 1698
EP - 1704
T2 - Journal of Materials Research
TI - Ordering in (La,Sr)(Al,Ta)O3 substrates
VL - 18
SN - 08842914
ER -