Optical functions of Ca-modified PbTiO3 thin films determined by spectroscopic ellipsometry

Authors
Li, H Tang, X Li, Q Liu, Y Tang, Z Zhang, Y Mo, D
Citation
H. Li et al., Optical functions of Ca-modified PbTiO3 thin films determined by spectroscopic ellipsometry, SOL ST COMM, 114(6), 2000, pp. 347-350
Citations number
12
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
SOLID STATE COMMUNICATIONS
ISSN journal
00381098 → ACNP
Volume
114
Issue
6
Year of publication
2000
Pages
347 - 350
Database
ISI
SICI code
0038-1098(2000)114:6<347:OFOCPT>2.0.ZU;2-T
Abstract
Calcium-modified lead titanate thin films deposited on Si(100) substrate ha ve been prepared by sol-gel processing. The structural properties of the th in films have been studied by X-ray diffraction. The ellipsometric spectra of the Pb1-xCaxTiO3 (x = 0.0-0.4) films have been obtained in the spectral range of 2.2-5.0 eV, and their optical constants (the refractive index n an d the extinction coefficient k) determined. The results show that after dop ing Ca, the refractive indexes of the Pb1-xCaxTiO3 films increase, the maxi mum value of refractive indexes and the absorption edges shift to lower ene rgy. (C) 2000 Elsevier Science Ltd. All rights reserved.