Unusual dynamics of the ferroelectric phase transition in K1-xLixTaO3 crystals
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F22%3A00361854" target="_blank" >RIV/68407700:21340/22:00361854 - isvavai.cz</a>
Alternative codes found
RIV/68378271:_____/22:00557953
Result on the web
<a href="https://doi.org/10.1103/PhysRevB.105.184103" target="_blank" >https://doi.org/10.1103/PhysRevB.105.184103</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevB.105.184103" target="_blank" >10.1103/PhysRevB.105.184103</a>
Alternative languages
Result language
angličtina
Original language name
Unusual dynamics of the ferroelectric phase transition in K1-xLixTaO3 crystals
Original language description
K1-xLixTaO3 (x = 0.043, 0.08) crystals, characterized by pyroelectric current with calculated spontaneous polarization and zero-field second-harmonic generation, have been studied by broadband dielectric spectroscopy, including time-domain terahertz transmission and infrared (IR) reflectivity, and by polarized Raman spectroscopy in the 10–300 K temperature range. This multiexperimental approach has proven the percolative nature of the ferroelectric (FE) transition at low temperatures and demonstrated that the FE phase is inherently inhomogeneous and displays coexistence of FE and relaxor regions. Thanks to the very broad frequency range studied (from 1 Hz to 20 THz), the relevant excitations were identified and fitted in the dielectric response of both crystals: three relaxations, a central mode (CM), and a soft mode (SM) that splits into three components on cooling. Two Cole-Cole relaxations, thermally activated below ~150K, but staying in the gigahertz range at higher temperatures, do not show any frequency anomaly at the FE transition and are therefore related to the non-FE parts of the sample volume.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
PHYSICAL REVIEW B
ISSN
2469-9950
e-ISSN
2469-9969
Volume of the periodical
105
Issue of the periodical within the volume
18
Country of publishing house
US - UNITED STATES
Number of pages
17
Pages from-to
—
UT code for WoS article
000804728000003
EID of the result in the Scopus database
2-s2.0-85130079657