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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.)

Electrical properties of calcium doped BiFeO3 films on LaNiO3 coated Pt substrates

Full text
Author(s):
Goncalves, L. F. [1] ; Rocha, L. S. R. [1] ; Hangai, B. [1] ; Silva Ortega, Pedro Paulo [1] ; Longo, E. [2] ; Simoes, Alexandre Z. [1]
Total Authors: 6
Affiliation:
[1] Sao Paulo State Univ, Unesp, Sch Engn, Guaratingueta - Brazil
[2] Sao Paulo State Univ, Inst Chem, Unesp, Araraquara - Brazil
Total Affiliations: 2
Document type: Journal article
Source: PROCESSING AND APPLICATION OF CERAMICS; v. 12, n. 2, p. 153-164, 2018.
Web of Science Citations: 0
Abstract

Pure and calcium-modified (CaxBi1-xFeO3, x = 0.0, 0.1, 0.2, 0.30) thin films were fabricated on Pt(111)/Ti/SiO2/Si substrates by the soft chemical method using LaNiO3 as the bottom electrode. Highly (200)-oriented BFO film was coherently grown on LNO at 500 degrees C. Ca-doped BiFeO3 films have a dense microstructure and rounded grains. The conventional problem of the leakage current for the highest doped film was reduced from 10(-5) to 10(-10) with remarkable improvement in the film/electrode interface, chemical homogeneity, crystallinity, and morphology of the BFO film. Enhanced ferroelectricity was observed at room temperature due to the bottom electrode. Fatigue-free films were grown on LaNiO3 bottom electrodes with no degradation after 1x10(10) switching cycles at an applied voltage of 5 V with a frequency of 1 MHz. After several tests the capacitors retained 77% of its polarization upon a retention time of 10(4) s. Room temperature magnetic coercive field measurements indicate that the magnetic behaviour is influenced by the nature of the bottom electrode. (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