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Crystallographic changes in (CaxSr1−x)n+1 TinO3n+1 layer perovskites: XPS and XAES investigations

Published online by Cambridge University Press:  31 January 2011

S. Myhra ,
J.C. Rivière ,
K. Hawkins  and
T.J. White
S. Myhra*
Affiliation:
AEA Industrial Technology, Harwell Laboratory, Didcot, Oxfordshire, OX11 ORA, United Kingdom
J.C. Rivière
Affiliation:
AEA Industrial Technology, Harwell Laboratory, Didcot, Oxfordshire, OX11 ORA, United Kingdom
K. Hawkins
Affiliation:
Electron Microscope Centre, Queensland University, St. Lucia, Queensland, 4067, Australia
T.J. White
Affiliation:
Electron Microscope Centre, Queensland University, St. Lucia, Queensland, 4067, Australia
*
a)Permanent address: Division of Science and Technology, Griffith University, Nathan, Queensland 4111, Australia.
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Abstract

Layered perovskites (Ruddlesden–Popper phases), (CaxSr1−x)n+1 TinO3n+1 with n = 3, ∞ and x ranging from 0 to 1, have been investigated by XPS and XAES. The structural transitions, identified in other studies, have been correlated with changes in the chemical environments of the constituent species. In particular, the tetragonal to orthorhombic transition at x = 0.65 ± 0.1 appears to generate nonequivalent cation environments for the alkaline earth species in (Ca, Sr)O12 coordination. Other binding and kinetic energy shifts can be correlated with changes in and distortions of unit cell volumes.

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Type
Articles
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Journal of Materials Research , Volume 7 , Issue 2 , February 1992 , pp. 482 - 489
Copyright
Copyright © Materials Research Society 1992

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