About: Ferroelastic Phase in SrBi2Ta2O9 and Study of the Ferroelectric Phase-Transition Dynamics

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About: Ferroelastic Phase in SrBi2Ta2O9 and Study of the Ferroelectric Phase-Transition Dynamics Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Polarized microscope observation of ferroelastic domains in a SrBi2Ta2O9 (SBT) single crystal reveals the presence of domains up to Tc)similar or equal to770 K, which supports the ferroelasticity and Amam symmetry of the intermediate phase between ferroelectric and paraelectric phases. Far-infrared spectra of SBT ceramics, single crystal and thin films show a well underdamped optical soft mode at 28 cm-1, which partially softens to 21 cm-1 near the ferroelectric transition temperature. This softening does not explain the entire anomaly of low-frequency permittivity observed near Tc2. On the basis of high-frequency measurements, which do not show a significant dispersion, central-mode-type dispersion in the 10-100 GHz range is proposed as an explanation. So, the phase transition at Tc2 apparently shows a crossover behavior between the displacive and the order-disorder type. Polarized microscope observation of ferroelastic domains in a SrBi2Ta2O9 (SBT) single crystal reveals the presence of domains up to Tc)similar or equal to770 K, which supports the ferroelasticity and Amam symmetry of the intermediate phase between ferroelectric and paraelectric phases. Far-infrared spectra of SBT ceramics, single crystal and thin films show a well underdamped optical soft mode at 28 cm-1, which partially softens to 21 cm-1 near the ferroelectric transition temperature. This softening does not explain the entire anomaly of low-frequency permittivity observed near Tc2. On the basis of high-frequency measurements, which do not show a significant dispersion, central-mode-type dispersion in the 10-100 GHz range is proposed as an explanation. So, the phase transition at Tc2 apparently shows a crossover behavior between the displacive and the order-disorder type. (en)
Title	Ferroelastic Phase in SrBi2Ta2O9 and Study of the Ferroelectric Phase-Transition Dynamics Ferroelastic Phase in SrBi2Ta2O9 and Study of the Ferroelectric Phase-Transition Dynamics (en)
skos:prefLabel	Ferroelastic Phase in SrBi2Ta2O9 and Study of the Ferroelectric Phase-Transition Dynamics Ferroelastic Phase in SrBi2Ta2O9 and Study of the Ferroelectric Phase-Transition Dynamics (en)
skos:notation	RIV/68407700:21340/02:04083763!RIV/2003/MSM/213403/N
http://linked.open.../vavai/riv/strany	1056;1058
http://linked.open...avai/riv/aktivita	Z
http://linked.open...avai/riv/aktivity	Z(MSM 210000021)
http://linked.open...iv/cisloPeriodika	6
http://linked.open...vai/riv/dodaniDat	2003
http://linked.open...aciTvurceVysledku	Pokorný, Jan
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	České vysoké učení technické v Praze / Fakulta jaderná a fyzikálně inženýrská
http://linked.open...dnocenehoVysledku	646094
http://linked.open...ai/riv/idVysledku	RIV/68407700:21340/02:04083763
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	CRYSTAL-STRUCTURE, SR0.85BI2.1TA2O9, TANTALATE (en)
http://linked.open.../riv/klicoveSlovo	CRYSTAL-STRUCTURE SR0.85BI2.1TA2O9 TANTALATE
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[4C88E5AF6173]
http://linked.open...i/riv/nazevZdroje	Applied Physics Letters
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	8 (xsd:int)
http://linked.open...ocetUcastnikuAkce	0 (xsd:int)
http://linked.open...nichUcastnikuAkce	0 (xsd:int)
http://linked.open...UplatneniVysledku	2002
http://linked.open...v/svazekPeriodika	81
http://linked.open...iv/tvurceVysledku	Pokorný, Jan
http://linked.open...n/vavai/riv/zamer	http://linked.opendata.cz/resource/domain/vavai/zamer/MSM%20210000021
issn	0003-6951
number of pages	3 (xsd:int)
http://localhost/t...ganizacniJednotka	21340

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