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Symmetry mode analysis of the phase transitions in Rb.sub.2./sub.ZnBr.sub.4./sub..
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SYSNO ASEP 0366892 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Symmetry mode analysis of the phase transitions in Rb2ZnBr4. Author(s) Zúniga, F. J. (ES)
Perez-Mato, J. M. (ES)
Orobengoa, D. (ES)
Petříček, Václav (FZU-D) RID, ORCID, SAI
Breczewski, T. (ES)Source Title Zeitschrift für Kristallographie - ISSN 0044-2968
Roč. 226, č. 5 (2010), s. 454-466Number of pages 13 s. Language eng - English Country DE - Germany Keywords structure analysis ; symmetry-adapted modes ; structure refinement Subject RIV BM - Solid Matter Physics ; Magnetism CEZ AV0Z10100521 - FZU-D (2005-2011) UT WOS 000291124200002 DOI 10.1524/zkri.2011.1367 Annotation Crystal structures of low temperature phases III, IV and V of rubidium zinc bromide have been determined by single crystal X-ray diffraction at 90 K, 85 K, and 30 K, respectively. The analysis of the structures in terms of symmetry-adapted modes of the high temperature prototype phase permits the identification of the modes responsible for each phase and to assess its thermal evolution. The primary mode responsible for the incommensurate and lock-in phases remains dominant throughout the whole transition sequence, maintaining its structure and slightly increasing its amplitude as tempera! ture decreases. The two monoclinic phases IV and V are presumably due to the instability of a second mode associated with a single active irreducible representation. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2012
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