Enhanced self-repairing capability of sol-gel derived SrTiO{sub 3}/nano Al{sub 2}O{sub 3} composite films
- Functional Materials Research Laboratory, School of Materials Science and Engineering, Tongji University, Shanghai 201804 (China)
SrTiO{sub 3}/nano Al{sub 2}O{sub 3} inorganic nanocomposites were prepared by using a conventional sol-gel spin coating process. For comparison, SrTiO{sub 3} films doped by equivalent amount of sol-Al{sub 2}O{sub 3} have also been investigated. Aluminum deposited by using vacuum evaporation was used as the top electrode. The nanocomposites exhibited a significantly enhanced dielectric strength of 506.9 MV/m, which was increased by 97.4% as compared with the SrTiO{sub 3} films doped with sol-Al{sub 2}O{sub 3}. The leakage current maintained of the same order of microampere until the ultimate breakdown of the nanocomposites. The excellent electrical performances are ascribed to the anodic oxidation reaction in origin, which can repair the internal and/or surface defects of the films.
- OSTI ID:
- 22590501
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 9 Vol. 109; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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