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

Autor(es)

Pontes, D. S. L. ^[1] ; Pontes, F. M. ^[2] ; Chiquito, A. J. ^[3] ; Longo, E. ^{[1, 4]}

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS; v. 185, p. 123-128, JUL 2014.
• Citações Web of Science: 2

Resumo

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)

• Processo FAPESP: 11/20536-7 - Materiais Ferroelétricos Multifuncionais: Estudos das Propriedades Ópticas, Elétricas e Fotoluminescente.
• Beneficiário: Debora da Silva Lima Pontes
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 08/57150-6 - Filmes finos ferroeletricos do tipo pbct, pbst e pcst: estudo experimental e teorico.
• Beneficiário: Debora da Silva Lima Pontes
• Modalidade de apoio: Bolsas no Brasil - Doutorado