Abstract
The structural characteristics of Sr1-x Lax TiO3+δ (0≤x≤0.4) at 1400°C have been investigated as a function of ambient oxygen partial pressure. A modified Rietveld pattern-fitting structure-refinement program [H. M. Rietveld, J. Appl. Crystallogr. 2, 65 (1969)] was used to determine the nature of the distortions of the fundamental perovskite unit cell, the degree of lattice perfection, and the cation vacancy concentrations. Specimens equilibrated in forming gas displayed a linear relation between x, the lattice parameters, and the degree of lattice perfection while those samples annealed in air and oxygen deviated significantly from linearity. A monoclinic distortion of the perovskite structure was seen in the samples at low oxygen partial pressures while a second phase or layer type of distortion appeared in samples with x>0.2 under oxidizing conditions.
Recommended Citation
S. A. Howard et al., "Structural Characteristics Of Sr1-xLaxTi 3+δ As A Function Of Oxygen Partial Pressure At 1400°C," Journal of Applied Physics, vol. 65, no. 4, pp. 1492 - 1498, American Institute of Physics, Dec 1989.
The definitive version is available at https://doi.org/10.1063/1.342963
Department(s)
Materials Science and Engineering
International Standard Serial Number (ISSN)
0021-8979
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2023 American Institute of Physics, All rights reserved.
Publication Date
01 Dec 1989
