Disorder in strontium barium niobate: local structure, phonons, and polarization dynamics

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F21%3A00553379" target="_blank" >RIV/68378271:_____/21:00553379 - isvavai.cz</a>

Výsledek na webu

<a href="https://ieeexplore.ieee.org/document/9052730" target="_blank" >https://ieeexplore.ieee.org/document/9052730</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/TUFFC.2020.2984829" target="_blank" >10.1109/TUFFC.2020.2984829</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Disorder in strontium barium niobate: local structure, phonons, and polarization dynamics

Popis výsledku v původním jazyce

Strontium barium niobate, has been recently studied by the scattering and spectroscopic techniques [diffuse scattering (DS), Raman, infrared, and high-frequency dielectric spectroscopies] to decipher the nature of its ferroelectric-relaxor transformation tuned by composition. DS revealed that mesoscopic range ordered correlations along the polar axis are presented in the crystal, being less organized in the relaxor compositions with higher Sr content. For these compositions, transverse polar correlations are found to be anisotropic. Pair distribution function experiments and first-principle calculations in several compositions showed a concomitant new peak around 6.5 Å, which develops on cooling and cannot be explained by the current structural models with long-range incommensurate oxygen tilts but with a short-range ordered tilt arrangement. This relates with two independent polarization networks showing disparate dynamics, temperature behavior, and correlation lengths.

Název v anglickém jazyce

Disorder in strontium barium niobate: local structure, phonons, and polarization dynamics

Popis výsledku anglicky

Strontium barium niobate, has been recently studied by the scattering and spectroscopic techniques [diffuse scattering (DS), Raman, infrared, and high-frequency dielectric spectroscopies] to decipher the nature of its ferroelectric-relaxor transformation tuned by composition. DS revealed that mesoscopic range ordered correlations along the polar axis are presented in the crystal, being less organized in the relaxor compositions with higher Sr content. For these compositions, transverse polar correlations are found to be anisotropic. Pair distribution function experiments and first-principle calculations in several compositions showed a concomitant new peak around 6.5 Å, which develops on cooling and cannot be explained by the current structural models with long-range incommensurate oxygen tilts but with a short-range ordered tilt arrangement. This relates with two independent polarization networks showing disparate dynamics, temperature behavior, and correlation lengths.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control

ISSN

0885-3010

e-ISSN

1525-8955

Svazek periodika

68

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

314-324

Kód UT WoS článku

000613348000012

EID výsledku v databázi Scopus

2-s2.0-85100400826