Structural characterisation of the perovskite series Sr{sub 0.9-x}Ca{sub x}Ce{sub 0.1}MnO{sub 3}: Influence of the Jahn-Teller effect

Journal Article · Wed Apr 15 00:00:00 EDT 2009 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2008.12.032· OSTI ID:21370362

Ting, Jimmy; Qingdi, Zhou ^[1]; Zhaoming, Zhang ^[2]; Matsuda, Motohide; Miyake, Michihiro ^[3]

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1. School of Chemistry, University of Sydney, New South Wales 2006 (Australia)
2. Australian Nuclear Science and Technology Organisation, Private Mail Bag 1, Menai, NSW 2234 (Australia)
3. Graduate School of Environmental Science, Okayama University, 3-1-1 Tsushima-Naka, Okayama 700-8530 (Japan)

Fifteen perovskite-type compounds Sr{sub 0.9-x}Ca{sub x}Ce{sub 0.1}MnO{sub 3}, 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 Ce{sup 4+} in all the oxides. High temperature structures are reported for selected members. - Graphical abstract: At room temperature the oxides with x<=0.45 in the series Sr{sub 0.9-x}Ca{sub x}Ce{sub 0.1}MnO{sub 3} are tetragonal in I4/mcm with a large Jahn-Teller distortion, and those with x>=0.55 are orthorhombic, in Pbnm. Heating the tetragonal samples results in two transitions, ultimately the structure becomes cubic.

• OSTI ID: 21370362
• Journal Information: Journal of Solid State Chemistry, Vol. 182, Issue 4; Other Information: DOI: 10.1016/j.jssc.2008.12.032; PII: S0022-4596(08)00629-4; Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ABSORPTION SPECTROSCOPY
CALCIUM COMPOUNDS
CERIUM COMPOUNDS
CERIUM IONS
HEATING
JAHN-TELLER EFFECT
MANGANESE OXIDES
ORTHORHOMBIC LATTICES
PEROVSKITE
PHASE TRANSFORMATIONS
SPACE GROUPS
STRONTIUM COMPOUNDS
TEMPERATURE RANGE 0273-0400 K
TETRAGONAL LATTICES
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
CHARGED PARTICLES
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIFFRACTION
IONS
MANGANESE COMPOUNDS
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PEROVSKITES
RARE EARTH COMPOUNDS
SCATTERING
SPECTROSCOPY
SYMMETRY GROUPS
TEMPERATURE RANGE
TRANSITION ELEMENT COMPOUNDS