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Sr- and Ti-site substitution, lattice dynamics, and octahedral tilt transition relationship in SrTiO.sub.3./sub.:Mn ceramics
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SYSNO ASEP 0334805 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Sr- and Ti-site substitution, lattice dynamics, and octahedral tilt transition relationship in SrTiO3:Mn ceramics Title Vztah substituce v poloze atomu Sr a Ti k mřížkové dynamice a k fázovému přechodu natočení oktaedrů v keramikách SrTiO3:Mn Author(s) Tkach, A. (PT)
Vilarinho, P. M. (PT)
Nuzhnyy, Dmitry (FZU-D) RID, ORCID
Petzelt, Jan (FZU-D) RID, ORCID, SAISource Title Acta Materialia. - : Elsevier - ISSN 1359-6454
Roč. 58, č. 2 (2010), s. 577-582Number of pages 6 s. Language eng - English Country GB - United Kingdom Keywords SrTiO3 ; dopants ; structural phase transition ; phonon dynamics ; infrared and terahertz spectroscopy Subject RIV BM - Solid Matter Physics ; Magnetism CEZ AV0Z10100520 - FZU-D (2005-2011) UT WOS 000272917000025 DOI 10.1016/j.actamat.2009.09.036 Annotation SrTiO3:Mn ceramics, prepared according to the chemical formulae Sr1-xMnxTiO3 and SrTi1-yMnyO3, are studied by Fourier transform infrared and time-domain terahertz spectroscopy . Polar soft mode hardens in the whole temperature range by the substitution of Mn ions on Ti sites, but only in the low-temperature range by the Sr site substitution. Activation of the mode, associated with the R point condensation of the Brillouin zone below the structural transition temperature Ta shows that the substitution on the Sr sites increases Ta whereas the Ti-site substitution suppresses Ta. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2010
Number of the records: 1