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 04:00:00 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, Journal Name: Journal of Solid State Chemistry Journal Issue: 4 Vol. 182; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

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