Electrical properties of ferroelectric BaTiO{sub 3} thin film on SrTiO{sub 3} buffered GaAs by laser molecular beam epitaxy
- Department of Applied Physics and Materials Research Centre, Hong Kong Polytechnic University, Hong Kong (China)
Ferroelectric BaTiO{sub 3} thin films were epitaxially grown on (001) GaAs substrate using SrTiO{sub 3} as a buffer layer by laser molecular beam epitaxy. The perovskite SrTiO{sub 3} buffer layer present a body centered cubic structure by formation of an interfacial layer with the [100]SrTiO{sub 3} parallel [110]GaAs in-plane relationship. Thereupon, a highly c-oriented BaTiO{sub 3} thin film was grown on SrTiO{sub 3}/GaAs in a layer by layer mode. Enhanced electrical properties of the heteroepitaxial structure were demonstrated. The BaTiO{sub 3}(150 nm)/SrTiO{sub 3}/GaAs system demonstrates hysteresis loops with a remnant polarization of 2.5 {mu}C/cm{sup 2} at 600 kV/cm and a small leakage current density of 2.9x10{sup -7} A/cm{sup 2} at 200 kV/cm.
- OSTI ID:
- 21175878
- Journal Information:
- Applied Physics Letters, Vol. 94, Issue 3; Other Information: DOI: 10.1063/1.3075955; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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