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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.)

Dielectric properties of bismuth niobate films using LaNiO3 bottom electrode

Full text
Author(s):
Goncalves, L. F. [1] ; Rocha, L. S. R. [1] ; Silva, C. C. [1] ; Cortes, J. A. [1] ; Ramirez, M. A. [1] ; Simoes, A. Z. [1]
Total Authors: 6
Affiliation:
[1] Univ Estadual Paulista Unesp, Fac Engn Guaratingueta, Av Dr Ariberto Pereira da Cunha 333, BR-12516410 Sao Paulo - Brazil
Total Affiliations: 1
Document type: Journal article
Source: JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS; v. 27, n. 3, p. 2866-2874, MAR 2016.
Web of Science Citations: 2
Abstract

Bi3NbO7 (BNO) thin films were deposited on Pt/TiO2/SiO2/Si (100) and LaNiO3 bottom electrode substrates at room temperature from the polymeric precursor method. X-ray powder diffraction was used to investigate the formation characteristics and stability range of the tetragonal modification of a fluorite-type solid solution. The results showed that this tetragonal, commensurately modulated phase forms through the intermediate formation of the incommensurately modulated cubic fluorite phase followed by the incommensurate-commensurate transformation. LaNiO3 (LNO) bottom electrode strongly promotes the formation of high intensity (111) texture of BNO films. The dielectric constants of the films increased from 192 to 357 at 1 MHz with the bottom electrode while the leakage current behavior at room temperature of the films decreased from 10(-7) to 10(-8) A/cm(2) at a voltage of 5 V. The reduction of dc leakage current is explained on the basis of relative phase stability and improved microstructure of the material. The capacitance density of 75 fC/mu m(2), dielectric loss of 0.04 % at 1 MHz, and breakdown strength of about 0.30 MV/cm is compatible with embedded decoupling capacitors applications. (AU)

FAPESP's process: 08/57872-1 - National Institute for Materials Science in Nanotechnology
Grantee:Elson Longo da Silva
Support type: Research Projects - Thematic Grants
FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC