Ambience-sensitive optical refraction in ferroelectric nano?lms of NaNbO3./sub

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F14%3A00432844" target="_blank" >RIV/68378271:_____/14:00432844 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1088/1468-6996/15/4/045001" target="_blank" >http://dx.doi.org/10.1088/1468-6996/15/4/045001</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1468-6996/15/4/045001" target="_blank" >10.1088/1468-6996/15/4/045001</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Ambience-sensitive optical refraction in ferroelectric nano?lms of NaNbO3./sub

Popis výsledku v původním jazyce

The optical index of refraction n is studied by spectroscopic ellipsometry in electrode-less cube-on-cube-type epitaxial NaNbO3 ?lms with thicknesses of 9?14 nm and anisotropic lattice strain of (0?1)%. The index n is approximately 2.1?2.2 and it exhibits a strong sensitivity to atmospheric-pressure gas ambience. The index n in air signi?cantly exceeds that in an oxygen ambience, with the difference as large as ?n= 0.2. The thermo-optical behaviour n(T) indicates ferroelectric state in the NaNbO3 nano?lms, with the strain-dependent polarization and temperature of phase transition. The observed ambience-sensitive optical refraction is explained using the fundamental connection between refraction and ferroelectric polarization in perovskites, and considering screening of the depolarizing ?eld on ambience-sensitive thermodynamically stable surfaces of the NaNbO3 nano?lms.

Název v anglickém jazyce

Ambience-sensitive optical refraction in ferroelectric nano?lms of NaNbO3./sub

Popis výsledku anglicky

The optical index of refraction n is studied by spectroscopic ellipsometry in electrode-less cube-on-cube-type epitaxial NaNbO3 ?lms with thicknesses of 9?14 nm and anisotropic lattice strain of (0?1)%. The index n is approximately 2.1?2.2 and it exhibits a strong sensitivity to atmospheric-pressure gas ambience. The index n in air signi?cantly exceeds that in an oxygen ambience, with the difference as large as ?n= 0.2. The thermo-optical behaviour n(T) indicates ferroelectric state in the NaNbO3 nano?lms, with the strain-dependent polarization and temperature of phase transition. The observed ambience-sensitive optical refraction is explained using the fundamental connection between refraction and ferroelectric polarization in perovskites, and considering screening of the depolarizing ?eld on ambience-sensitive thermodynamically stable surfaces of the NaNbO3 nano?lms.

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

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název periodika

Science and Technology of Advanced Materials

ISSN

1468-6996

e-ISSN

—

Svazek periodika

15

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

6

Strana od-do

—

Kód UT WoS článku

000345025400010

EID výsledku v databázi Scopus

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