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BiFeO3 films on steel substrate by the citrate method |
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| Authors: | Mó nica Popa,Silviu Preda,Katarina Sedlá cková ,Daniel Crespo |
| Affiliation: | a Institute of Physical Chemistry “Ilie Murgulescu”, Romanian Academy, 202 Splaiul Independentei, 060021 Bucharest, Romania b Department of Applied Physics, Universitat Politècnica de Catalunya, Av. Canal Olimpic s/n Castelldefels 08860 Barcelona, Spain c Research Institute for Technical Physics and Materials Science, Hungarian Academy of Sciences, Konkoly-Thege M. út. 29-33, 1121 Budapest, Hungary |
| Abstract: | We deposited BiFeO3 films on stainless steel substrates using a simple low-temperature wet-chemical route. Bismuth and iron nitrates were used as metal source and citric acid as chelating agent to prepare a water solution and deposit the film by dipping the steel substrate in the viscous solution. We have investigated the composition, crystallinity and structure of the BiFeO3 film on steel by X-ray diffraction, X-ray photoelectron spectroscopy, high resolution scanning electron microscopy, conventional and high resolution transmission electron microscopy, and energy dispersive spectroscopy techniques. The film deposited on the steel substrate has two sublayers: a very thin (about 100 nm) nanocrystalline layer, with crystallite size of few nanometers, and a thicker (below 1 μm) crystalline layer. |
| Keywords: | Sol-gel deposition Citrate route Crack-free layer Nanocrystalline thin layer Steel Transmission electron microscopy Bismuth ferrite |
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