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Crystal structures and phase transitions in a-site deficient perovskites Ln1/3TaO3

Zhou, Q., Saines, P.J., Sharma, N., Ting, J., Kennedy, B.J., Zhang, Z., Withers, R.L., Wallwork, K.S. (2008) Crystal structures and phase transitions in a-site deficient perovskites Ln1/3TaO3. Chemistry of Materials, 20 (21). pp. 6666-6676. ISSN 08974756 (ISSN). (doi:10.1021/cm8014868) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
https://doi.org/10.1021/cm8014868

Abstract

The synthesis and structures of the perovskites Ln1/3TaO 3 are described. As the size of the Ln cation is reduced, the compounds display a sequence of structure: P4/mmm/La â?? Cmmm/Ce-Gd â?? Pmma/Tb, Dy â?? Pmc21/Ho, Er. Although apparently tetragonal in P4/mmm, electron diffraction patterns of Tm1/3TaO3 reveal this has a complex incommensurate structure. Likewise Gd1/3TaO 3 appears metrically tetragonal, but electron diffraction and synchrotron X-ray powder diffraction demonstrate this is actually orthorhombic. The suppression of the spontaneous orthorhombic strain in Gd 1/3TaO3 is thought to be due to the proximity to the first-order Cmmm-Pmma transition. Variable temperature studies show both Tb 1/3TaO3 and Dy1/3TaO3 undergo a first-order Cmmm-Pmma transition upon heating. © 2008 American Chemical Society.

Item Type: Article
DOI/Identification number: 10.1021/cm8014868
Additional information: Unmapped bibliographic data: LA - English [Field not mapped to EPrints] J2 - Chem. Mater. [Field not mapped to EPrints] AD - School of Chemistry, University of Sydney, Sydney, NSW 2006, Australia [Field not mapped to EPrints] AD - Institute of Materials Engineering, Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW 2234, Australia [Field not mapped to EPrints] AD - Research School of Chemistry, Australian National University, Canberra, ACT 0200, Australia [Field not mapped to EPrints] AD - Australian Synchrotron, 800 Blackburn Road, Clayton, VIC 3168, Australia [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints]
Uncontrolled keywords: Crystal structure, Diffraction, Dysprosium compounds, Electron diffraction, Erbium, Erbium compounds, Gadolinium, Holmium, Holographic interferometry, Perovskite, Electron diffraction patterns, First orders, Incommensurate structures, Powder diffractions, Variable temperatures, Phase transitions
Subjects: Q Science > QC Physics > QC173.45 Condensed Matter
Q Science > QD Chemistry > QD478 Solid State Chemistry
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Paul Saines
Date Deposited: 07 Oct 2015 10:14 UTC
Last Modified: 29 May 2019 16:04 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/50735 (The current URI for this page, for reference purposes)
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