Conductivity in ferroelectric barium titanate: electrons versus oxygen vacancies

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F21%3A00552238" target="_blank" >RIV/68378271:_____/21:00552238 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1109/TUFFC.2020.2978901" target="_blank" >https://doi.org/10.1109/TUFFC.2020.2978901</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/TUFFC.2020.2978901" target="_blank" >10.1109/TUFFC.2020.2978901</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Conductivity in ferroelectric barium titanate: electrons versus oxygen vacancies

Popis výsledku v původním jazyce

Mobile oxygen vacancies are increasingly wider believed to be responsible for electrical conductivity in perovskite oxide ferroelectrics. Here, this hypothesis is debated. The small-signal conductivity is investigated in oxygen-deficient films of barium titanate, where oxygen vacancies are epitaxially clamped and immobile. The observed behavior of conductivity as a function of temperature and frequency evidences pure electronic processes. Importantly, it is shown that these processes mimic motion of oxygen vacancies, which are immobile. It is also demonstrated that under applied dc electric field, the electronic processes lead to such effects as coloration and degradation, which before were plausibly ascribed to migration of oxygen vacancies. Finally, it is concluded that the hypothesis of mobile oxygen vacancies is misleading.

Název v anglickém jazyce

Conductivity in ferroelectric barium titanate: electrons versus oxygen vacancies

Popis výsledku anglicky

Mobile oxygen vacancies are increasingly wider believed to be responsible for electrical conductivity in perovskite oxide ferroelectrics. Here, this hypothesis is debated. The small-signal conductivity is investigated in oxygen-deficient films of barium titanate, where oxygen vacancies are epitaxially clamped and immobile. The observed behavior of conductivity as a function of temperature and frequency evidences pure electronic processes. Importantly, it is shown that these processes mimic motion of oxygen vacancies, which are immobile. It is also demonstrated that under applied dc electric field, the electronic processes lead to such effects as coloration and degradation, which before were plausibly ascribed to migration of oxygen vacancies. Finally, it is concluded that the hypothesis of mobile oxygen vacancies is misleading.

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

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

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

7

Strana od-do

296-302

Kód UT WoS článku

000613348000010

EID výsledku v databázi Scopus

2-s2.0-85100377489