About: Antiferrodistortive phase transition in EuTiO3.

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	X-ray diffraction, dynamical mechanical analysis, and infrared reflectivity studies revealed an antiferrodistortive phase transition in EuTiO3 ceramics. Near 300 K, the perovskite structure changes from cubic Pm3m to tetragonal I4/mcm. Some ceramics as well as single crystals of EuTiO3 show different infrared reflectivity spectra bringing evidence of a different crystal structure. In such samples, electron diffraction revealed an incommensurate tetragonal structure with modulation wave vector q 0.38aa. Extra phonons in samples with modulated structure are activated in the IR spectra due to folding of the Brillouin zone. We propose that defects such as Eu3+ and oxygen vacancies strongly influence the temperature of the phase transition to antiferrodistortive phase as well as the tendency to incommensurate modulation in EuTiO3. X-ray diffraction, dynamical mechanical analysis, and infrared reflectivity studies revealed an antiferrodistortive phase transition in EuTiO3 ceramics. Near 300 K, the perovskite structure changes from cubic Pm3m to tetragonal I4/mcm. Some ceramics as well as single crystals of EuTiO3 show different infrared reflectivity spectra bringing evidence of a different crystal structure. In such samples, electron diffraction revealed an incommensurate tetragonal structure with modulation wave vector q 0.38aa. Extra phonons in samples with modulated structure are activated in the IR spectra due to folding of the Brillouin zone. We propose that defects such as Eu3+ and oxygen vacancies strongly influence the temperature of the phase transition to antiferrodistortive phase as well as the tendency to incommensurate modulation in EuTiO3. (en)
Title	Antiferrodistortive phase transition in EuTiO3. Antiferrodistortive phase transition in EuTiO3. (en)
skos:prefLabel	Antiferrodistortive phase transition in EuTiO3. Antiferrodistortive phase transition in EuTiO3. (en)
skos:notation	RIV/68378271:_____/12:00380651!RIV13-GA0-68378271
http://linked.open...avai/riv/aktivita	I P Z
http://linked.open...avai/riv/aktivity	I, P(ED1.1.00/02.0068), P(GAP204/12/1163), P(LD11035), P(LD12026), Z(AV0Z10100520), Z(AV0Z10100521)
http://linked.open...iv/cisloPeriodika	5
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Dušek, Michal Kamba, Stanislav Palatinus, Lukáš Drahokoupil, Jan Pacherová, Oliva Savinov, Maxim Rohlíček, Jan Goian, Veronica
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Fyzikální ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	122940
http://linked.open...ai/riv/idVysledku	RIV/68378271:_____/12:00380651
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	antiferrodistortive structure; phase transition; X-ray diffraction; infrared reflectivity; EuTiO3 (en)
http://linked.open.../riv/klicoveSlovo	X-ray diffraction phase transition EuTiO3 antiferrodistortive structure infrared reflectivity
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[7B3D61AE794B]
http://linked.open...i/riv/nazevZdroje	Physical Review. B
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	8 (xsd:int)
http://linked.open...cetTvurcuVysledku	17 (xsd:int)
http://linked.open...vavai/riv/projekt	Phonon and dielectric spectroscopy of multiferroics Study of lattice dynamics in ferroics and multiferroics. Central european institute of technology Processing and properties of ferroics and multiferroics
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	86
http://linked.open...iv/tvurceVysledku	Dušek, Michal Drahokoupil, Jan Kamba, Stanislav Palatinus, Lukáš Goian, Veronica Pacherová, Oliva Savinov, Maxim Maca, K. Weidenkaff, A. Belik, A. A. Laufek, F. Rohlíček, Jan Fuith, A. Kachlik, M. Sagarna, L. Schranz, W. Shkabko, A.
http://linked.open...ain/vavai/riv/wos	000307717600001
http://linked.open...n/vavai/riv/zamer	Specific effects in condensed systems with reduced dimension and broken symmetry Physics and technology of nanostructures, surfaces and thin films
issn	1098-0121
number of pages	9 (xsd:int)
http://bibframe.org/vocab/doi	10.1103/PhysRevB.86.054112

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