Thermochemistry of MgB/sub 2/ thin film synthesis
| Autor: | Jihoon Kim, J. M. Rowell, Nathan Newman, Rakesh Kumar Singh |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Superconductivity
Condensed Matter - Materials Science Sticking coefficient Materials science Condensed matter physics Condensed Matter - Superconductivity Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences Condensed Matter Physics Kinetic energy Decomposition Electronic Optical and Magnetic Materials Pulsed laser deposition Superconductivity (cond-mat.supr-con) Crystallinity Chemical engineering Thermochemistry Electrical and Electronic Engineering Thin film |
| Zdroj: | IEEE Transactions on Appiled Superconductivity. 13:3238-3241 |
| ISSN: | 1051-8223 |
| DOI: | 10.1109/tasc.2003.812210 |
| Popis: | We have investigated the thermodynamic and kinetic barriers involved in the synthesis of MgB2 films. This work refines our initial conjectures predicting optimal MgB2 thin film growth conditions as a consequence of the unusually large kinetic barrier to MgB2 decomposition. The small Mg sticking coefficient at temperatures greater than 300C prevents high temperature synthesis with traditional vacuum growth methods. However, as a result of the large kinetic barrier to MgB2 decomposition, in-situ thermal processing can be used to enhance the crystallinity and the superconductivity of MgB2 films. We used these methods to produce MgB2 thin films with relatively high transition temperatures (37K) by pulsed laser deposition (PLD). 11 pages, 6 figures, ASC2002 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|