Structural characterisation of the perovskite series Sr0.9-xCaxCe0.1MnO3: influence of the Jahn-Teller effect

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Date
2009-04
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Publisher
Elsevier
Abstract
Fifteen perovskite-type compounds Sr0.9−xCaxCe0.1MnO3, x=0–0.9 in steps as fine as 0.05, have been synthesised by solid state methods, and the room temperature structures characterised using X-ray synchrotron powder diffraction. At low Ca contents (x≤0.45) the structures are tetragonal in space group I4/mcm and at high Ca contents (x≥0.55) the compounds are orthorhombic in space group Pbnm. At room temperature these two phases co-exist in the compound with x=0.5. XANES measurements show the Ce to be present as Ce4+ in all the oxides. High temperature structures are reported for selected members. © 2009, Elsevier Ltd.
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Keywords
Perovskite, Phase transformations, Jahn-Teller effect, Diffraction, Temperature dependence, Tetragonal lattices
Citation
Kennedy, B. J., Ting, J., Zhou, Q. D., Zhang, Z., Matsuda, M., & Miyake, M. (2009). Structural characterisation of the perovskite series Sr0.9-xCaxCe0.1MnO3: influence of the Jahn-Teller effect. Journal of Solid State Chemistry, 182(4), 954-959. doi:10.1016/j.jssc.2008.12.032
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