Please use this identifier to cite or link to this item:
Title: Optical Properties of Lead-Free NKN Films from Transmission and Spectral Ellipsometry
Author: Schwarz, R.
Santos, L.
Ayouchi, R.
Bhattacharyya, S. R.
Mardolcar, U.
Leal, M.
Kholkin, A.
Keywords: THIN-FILMS
Issue Date: 2013
Abstract: Thin films of lead-free NaxK1-xNbO3 (NKN) were prepared by pulsed laser deposition (PLD) from ceramic targets of stoichiometric NKN or doped with 6% of lithium niobate (LN). At a deposition temperature of 600 degrees C a strong dependence of film morphology on laser fluence is revealed by SEM microscopy. Optical properties like band gap and index of refraction were obtained through transmission measurements and analysis based on the Tauc model. The results were compared to spectral ellipsometry using a fit to the Tauc-Lorentz model, and slightly smaller band gap values were obtained. C-V characteristics of sandwich structures yielded high permittivity of 380 in pure NKN films and tunability at 1kHz of 3.2% at 1.5 MV/m applied electric field.
Peer review: yes
DOI: 10.1080/00150193.2013.821018
ISSN: 0015-0193
Publisher Version: 10.1080/00150193.2013.821018
Appears in Collections:CICECO - Artigos

Formato BibTex MendeleyEndnote Degois 

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.