Potassium tantalate niobate thin films for spaceborne pyroelectric detectors
| Autor: | G. Scott Hubbard, R. P. Reade, Jeffrey W. Beeman, E. E. Haller, H. B. Cherry, Robert E. McMurray |
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| Rok vydání: | 1997 |
| Předmět: |
Materials science
Analytical chemistry Heterojunction Condensed Matter Physics Laser Electronic Optical and Magnetic Materials law.invention Tantalate Pulsed laser deposition Pyroelectricity Operating temperature Control and Systems Engineering law Materials Chemistry Ceramics and Composites Electrical and Electronic Engineering Thin film Yttria-stabilized zirconia |
| Zdroj: | Integrated Ferroelectrics. 15:261-269 |
| ISSN: | 1607-8489 1058-4587 |
| DOI: | 10.1080/10584589708015717 |
| Popis: | Potassium tantalate niobate (KTN) thin film pyroelectric detectors are being developed for broad band spaceborne sensors where passively cooled operating temperatures ∼ 90K are easily attained. The ability to tailor the phase transition temperature of KTN through composition control makes it an ideal candidate for such applications. Decreasing the operating temperature from 300K to 90K allows for over an order of magnitude increase in the background-limited sensitivity of a pyroelectric detector. Current research focuses on optimizing the composition and structure of laser deposited KTa0.91Nb0.09O3 (Tc = 93K) thin films. Preliminary studies of materials for bottom electrodes are being performed using Pt and conducting oxides with the perovskite structure: La0.5Sr0.5CoO3 (LSC), YBa2Cu3O7-∂ (YBCO) and SrRuO3. KTN films have been grown by pulsed laser deposition on LaAlO3, Pt/Si3N4/Si, LSC/LaAlO3, YBCO/SrTiO3, YBCO/LaAlO3, and YBCO/YSZ (yttria-stabilized ZrO2) substrates and heterostructures. The hi... |
| Databáze: | OpenAIRE |
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