Affiliation:
1. Harbin University of Science and Technology
2. Anqing Normal University
3. Jinan University
Abstract
Sr0.5Ba0.5-xBixTiO3 (SBT) thin films were fabricated on a Pt/SiO2/Si substrate by sol-gel method. The effects of chelating agent acetylacetone (HAcHAc) on the formation temperature and the microstructure of Sr0.5Ba0.5-xBixTiO3 (SBT) thin films were investigated in this paper. The microstructure of BST thin films was examined by XRD and TEM. It is found that Bi3+ doping decreases dielectric loss, improves frequency dispersion for BST thin films. The peak of temperature-dependence of dielectric constant of Bi3+-doped BST thin films is compressed and moves to a low-temperature region. An inclined angle of approximately 1.8o between the two different polarization vectors was observed for BST thin film from the results of high-resolution transmission electron microscopy (HRTEM). The Pr, Ps and Ec was 0.22μC/cm2, 0.72μC/cm2 and 60Kv/cm respectively for Sr0.5Ba0.485Bi0.015TiO3 thin film at 100Hz, 20V.
Publisher
Trans Tech Publications, Ltd.
Reference13 articles.
1. L. Jaemo, O. Auciello and P. K. Baumann, et al., Composition-control of magnetron- sputter-deposited (BaxSr1–x)Ti1+yO3+z thin films for voltage tunable devices, Appl. Phys. Lett. Vol. 76 (2000) No. 5, pp.625-627.
2. S.Y. Kuo, Dependence of luminescence efficiency on dopant concentration and sintering temperature in the erbium-doped Ba0. 7Sr0. 3TiO3 thin films, J. Appl. Phys. Vol. 92 (2002) No. 2, pp.1868-1872.
3. M. C. Gust, L. A. Momoda and N. D. Evans, et al., Crystallization of Sol–Gel-derived barium strontium titanate thin films, J. Am. Ceram. Soc. Vol. 84 (2001), pp.1087-1092.
4. B. K. Park, J. H. Lee and D. Y. Kim, Positive temperature coefficient of resistance effect in heavily niobium-doped barium titanate by the growth of the double-twinned seeds, J. Am. Ceram. Soc., Vol. 84 (2001), pp.2707-2709.
5. V. N. Tsygankov and V. V. Safonov, Dielectric properties of samarium substituted barium strontium titanate, J. Mater. Sci. Lett. Vol. 38 (2003) No. 4, pp.1269-1273.
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