| 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 Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 13/07296-2 - CDMF - Center for the Development of Functional Materials |
| Grantee: | Elson Longo da Silva |
| Support Opportunities: | Research Grants - Research, Innovation and Dissemination Centers - RIDC |