Ferroelectric (Ba,Sr)TiO3 and Pb(Zr,Ti)O3 thin films prepared by pulsed laser deposition
| Autor: | Hsiu-Fung Cheng, Yi-Chun Chen, You-Ming Tsau, I.-Nan Lin |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Materials science
Analytical chemistry Mineralogy Dielectric Substrate (electronics) Ferroelectricity Pulsed laser deposition chemistry.chemical_compound chemistry visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Strontium titanate Ceramic Thin film Electroceramics |
| Zdroj: | Journal of the European Ceramic Society. 21:1561-1564 |
| ISSN: | 0955-2219 |
| Popis: | Barium strontium titanate, (Ba, Sr)TiO 3 (BST), and lead zirconium titanate, Pb(Zr, Ti)O 3 (PZT) thin films were synthesized on indium-tin-oxide coated glass substrates using pulsed laser deposition process. Perovskite structure of these materials can be obtained by controlling the substrate temperature at 500–620°C. All the films possess good ferroelectric properties at low frequency regime. When both films were deposited at 500°C and measured at 10 GHz, the dielectric constant is e τ ≅1000 for (Ba, Sr)TiO 3 thin films and is e τ ≅550 for Pb(Zr, Ti)O 3 thin films. Optical transmission spectroscopies show that the Pb(Zr, Ti)O 3 thin films exhibit larger refractive index (( n ) PZT =2.1–2.8) than the (Ba, Sr)TiO 3 thin films (( n ) BST =1.95–2.15), which is ascribed to the heavier mass of the constituents in the Pb(Zr, Ti)O 3 thin films. The (Ba, Sr)TiO 3 thin films also possess much lower absorption coefficient (κ) than the Pb(Zr, Ti)O 3 thin films, which indicates that the (Ba, Sr)TiO 3 thin films contain less intrinsic defects than the Pb(Zr, Ti)O 3 materials. |
| Databáze: | OpenAIRE |
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