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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F02%3A04083763" target="_blank" >RIV/68407700:21340/02:04083763 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

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

Original language 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.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BM - Solid-state physics and magnetism

OECD FORD branch

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Project

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Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2002

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Applied Physics Letters

ISSN

0003-6951

e-ISSN

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Volume of the periodical

81

Issue of the periodical within the volume

6

Country of publishing house

US - UNITED STATES

Number of pages

3

Pages from-to

1056-1058

UT code for WoS article

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EID of the result in the Scopus database

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