Growth of YBa2Cu3O7-deltathin films in pulsed laser deposition: influence of target, substrate and deposition rate
| Autor: | M.P. McCurry, R J Turner, G. A. Farnan, C C Smith, D.G. Walmsley |
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| Rok vydání: | 2000 |
| Předmět: |
Auger electron spectroscopy
Materials science business.industry Metals and Alloys Substrate (electronics) Condensed Matter Physics Microstructure Laser law.invention Pulsed laser deposition Optics Carbon film law Materials Chemistry Ceramics and Composites Optoelectronics Deposition (phase transition) Electrical and Electronic Engineering Thin film business |
| Zdroj: | Superconductor Science and Technology. 13:262-272 |
| ISSN: | 1361-6668 0953-2048 |
| Popis: | The growth of smooth, high quality, c -axis thin films of optimally doped YBa2 Cu3 O7- on (001) MgO substrates has been studied using pulsed laser deposition. The films were characterized with Auger spectroscopy, x-ray diffraction, self-inductance and four-probe resistance techniques. We have found an interesting interaction between deposition rate, substrate topography and target oxygenation in the determination of film quality. The best films are produced with dense underoxygenated targets at low laser repetition rates (1 Hz) on very smooth substrates; the optimal deposition parameters for these are given. Atomic force microscopy shows spiral growth formations with a unit-cell edge height. Oriented outgrowths observed on some films are attributed to heat-modified substrate surface morphology. a -axis films also have been grown using PrBa2 Cu3 Ox template layers. |
| Databáze: | OpenAIRE |
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