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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Investigation of the structural, optical and dielectric properties of highly (100)-oriented (Pb0.60Ca0.20Sr0.20)TiO3 thin films on LaNiO3 bottom electrode

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Author(s):
Pontes, D. S. L. [1] ; Pontes, F. M. [2] ; Chiquito, A. J. [3] ; Longo, E. [1, 4]
Total Authors: 4
Affiliation:
[1] Univ Fed Sao Carlos, Dept Chem, Lab Interdisciplinar Eletroquim & Ceram, BR-13565905 Sao Carlos, SP - Brazil
[2] Univ Estadual Paulista, Dept Chem, BR-17033360 Bauru, SP - Brazil
[3] Univ Fed Sao Carlos, Dept Phys, NanO LaB, BR-13565905 Sao Carlos, SP - Brazil
[4] Univ Estadual Paulista, Inst Chem, Araraquara, SP - Brazil
Total Affiliations: 4
Document type: Journal article
Source: MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS; v. 185, p. 123-128, JUL 2014.
Web of Science Citations: 2
Abstract

Highly (100)-oriented Pb0.60Ca0.20Sr0.20TiO3/LNO/LAO structure was fabricated using a chemical deposition process via spin-coating technique. XRD revealed that both LNO and Pb0.60Ca0.20Sr0.20TiO3 films grown on LAO(100) substrate and LNO/LAO(100) structure were crystallized to be highly (h00)-oriented, respectively. AFM images revealed smooth surfaces, spherical-shaped grains and a crack-free surface with a roughness of about 3-7 nm. The tetragonal perovskite phase was confirmed by Raman spectroscopy for Pb0.60Ca0.20Sr0.20TiO3/LNO/LAO and Pb0.60Ca0.20Sr0.20TiO3/LAO structures. The optical transmittance of 340 nm thick Pb0.60Ca0.20Sr0.20TiO3 films on a LAO(100) substrate exhibited an average transmittance above 80% in the wavelength range of 500-1000 nm and an optical band gap E-g of 3.56 and 2.87 eV for the direct and indirect transition processes, respectively. The Pb0.60Ca0.20Sr0.20TiO3/LNO/LAO structure has a hysteresis loop with remnant polarization, P-r, of 12 mu C/cm(2), and a coercive field, E-c, of 46 kV/cm for an electric field at 370 kV/cm along with a dielectric constant over 1200. (C) 2014 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 11/20536-7 - Multifunctional Ferroelectric Materials: Studies of Optical, Electrical and Photoluminescent Properties.
Grantee:Debora da Silva Lima Pontes
Support Opportunities: Scholarships in Brazil - Post-Doctoral