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Proceedings Paper

Temperature variations of dielectric properties for single-domain/single-crystal thin films of Pb-Ti-O families
Author(s): Goh Asayama; Ryuta Ai; Kiyotaka Wasa
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Paper Abstract

Temperature variations of dielectric and/or ferroelectric properties were evaluated for the continuous single c-domain/single crystal thin films of Pb-Ti-O families, PbTiO3 (PT) and Pb0.8La0.2TiO0.95 [PLT(20)]. The thin films of Pb-Ti- O families, 100 to 300 nm in film thickness, were epitaxially grown on the miscut (001)SrTiO3) (ST)substrates by using rf-magnetron sputtering. The sputtered PT and PLT(20) thin films were tetragonally deformed, but the thin films were tightly bonded to the substrates. These thin films did not show the temperature anomaly in the lattice parameter unlikely to the bulk ferroelectric materials. The dielectric properties of the Pb-Ti-O thin films were evaluated in a Au/Pb-Ti-O/SRO/ST heterostructure with evaporated Au top electrodes and sputtered SRO (SrRuO3) base electrodes. The dielectric measurements showed the hysteresis feature at the heating up and cooling down stage probably due to the temperature change of their interfacial structure. The temperature-dielectric properties of the PT thin films showed the diffused peak at about 520 degree(s)C - 525 degree(s)C, which would corresponded the Curie temperature. The P/E hysteresis curves of the PT thin films showed zero polarization at 525 degree(s)C. The similar diffused temperature anomaly was also observed for the PLT(20) thin films.

Paper Details

Date Published: 6 September 2000
PDF: 8 pages
Proc. SPIE 4058, Superconducting and Related Oxides: Physics and Nanoengineering IV, (6 September 2000); doi: 10.1117/12.397860
Show Author Affiliations
Goh Asayama, Yokohama City Univ. (Japan)
Ryuta Ai, Yokohama City Univ. (Japan)
Kiyotaka Wasa, Yokohama City Univ. (Japan)

Published in SPIE Proceedings Vol. 4058:
Superconducting and Related Oxides: Physics and Nanoengineering IV
Davor Pavuna; Ivan Bozovic, Editor(s)

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