Fabrication and electrical properties of sol-gel-derived Ba0.8Sr0.2TiO3 ferroelectric films from a 0.05-M spin-on solution |
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| Authors: | J-G Cheng X-J Meng J Tang S-L Guo J-H Chu |
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| Institution: | (1) National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, P.R. China (Fax: +86-21/6583-0734, E-mail: jgcheng@mail.sitp.ac.cn), CN |
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| Abstract: | Barium strontium titanate (Ba0.8Sr0.2TiO3) films with good ferroelectricity have been obtained by a developed sol-gel processing, using a 0.05-M spin-on solution.
X-ray diffraction and Raman spectroscopy investigations showed that the Ba0.8Sr0.2TiO3 film exhibited a tetragonal structure at room temperature. Field-emission scanning electron microscopy measurements revealed
that large columnar grains with the size of 100 to 200 nm in the film were formed from the highly dilute spin-on solution
with layer-by-layer homoepitaxy. Electrical measurements for the prepared Ba0.8Sr0.2TiO3 film showed a remnant polarization of 3.5 μC/cm2, a coercive field of 53 kV/cm, two distinctive phase transitions, lower dissipation factor, and good insulating properties.
These results indicate the sol-gel-derived Ba0.8Sr0.2TiO3 film from a 0.05-M solution is suitable for uncooled infrared detector applications.
Received: 19 August 1999 / Accepted: 11 October 1999 / Published online: 1 March 2000 |
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| Keywords: | PACS: 77 80 Dj 81 20 Fw 77 84 Dy |
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