Nature of dielectric relaxation in SrTiO3:Mn single crystals

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F23%3A00580182" target="_blank" >RIV/68378271:_____/23:00580182 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1134/S0021364023603111" target="_blank" >https://doi.org/10.1134/S0021364023603111</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1134/S0021364023603111" target="_blank" >10.1134/S0021364023603111</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Nature of dielectric relaxation in SrTiO3:Mn single crystals

Popis výsledku v původním jazyce

Dielectric spectra of SrTiO3 and SrTiO3:Mn single crystals in the frequency range of 10–3000 cm–1 and in the temperature range of 5–297 K have been studied using time resolved terahertz spectroscopy and Fourier infrared spectroscopy. It has been established that doping with Mn ions reduces the antiferrodistortive phase transition temperature by about 20 K, but hardly affects the character of the temperature dependence of the parameters of a ferroelectric soft mode at temperatures of about 60–297 K. It has been found that an additional excitation with the frequency below the frequency of the ferroelectric soft mode should be taken into account for an appropriate model description of the dispersion of the permittivity of SrTiO3:Mn in the terahertz frequency range. The results obtained in this work indicate that dielectric relaxation in the SrTiO3:Mn crystal is due to thermally activated hops of Mn atoms between displaced (noncentral) crystallographic sites.n

Název v anglickém jazyce

Nature of dielectric relaxation in SrTiO3:Mn single crystals

Popis výsledku anglicky

Dielectric spectra of SrTiO3 and SrTiO3:Mn single crystals in the frequency range of 10–3000 cm–1 and in the temperature range of 5–297 K have been studied using time resolved terahertz spectroscopy and Fourier infrared spectroscopy. It has been established that doping with Mn ions reduces the antiferrodistortive phase transition temperature by about 20 K, but hardly affects the character of the temperature dependence of the parameters of a ferroelectric soft mode at temperatures of about 60–297 K. It has been found that an additional excitation with the frequency below the frequency of the ferroelectric soft mode should be taken into account for an appropriate model description of the dispersion of the permittivity of SrTiO3:Mn in the terahertz frequency range. The results obtained in this work indicate that dielectric relaxation in the SrTiO3:Mn crystal is due to thermally activated hops of Mn atoms between displaced (noncentral) crystallographic sites.n

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

2023

Kód důvěrnosti údajů

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

Název periodika

JETP Letters

ISSN

0021-3640

e-ISSN

1090-6487

Svazek periodika

118

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

RU - Ruská federace

Počet stran výsledku

9

Strana od-do

684-692

Kód UT WoS článku

001129530800012

EID výsledku v databázi Scopus

2-s2.0-85180457967