6533b82cfe1ef96bd128e9c5
RESEARCH PRODUCT
Thermo‐optical investigations of NaNbO 3 thin films by spectral ellipsometry
Alexandr DejnekaAnna LynnykVismants ZaulsIlze AulikaM. Kundzinssubject
ChemistryBand gapAnalytical chemistryPhysics::OpticsAtmospheric temperature rangeMolar absorptivityCondensed Matter PhysicsMolecular physicsEllipsometryAtomic electron transitionvisual_artvisual_art.visual_art_mediumCeramicThin filmRefractive indexdescription
In this work a spectroscopic ellipsometry was applied to the thermo-optical investigations of sodium niobate NaNbO3 (NN) thin films at the wide temperature range of 5–820 K. The temperature dependence of complex refractive index dispersions and optical bang energy of the direct allowed electron transitions were evaluated. Additionally dynamic scans of the main ellipsometric angles at the several fixed wave lengths of 300, 400, 500 and 635 nm were performed to acquire more detailed temperature dependences of the refractive index and extinction coefficient. Pronounced minima/maxima and substantial jumps in the temperature dependence of complex refractive index and band gap energy were found and corresponded to the structural phase transition temperatures of NN single crystals and ceramics. (© 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-12-01 | physica status solidi c |