Physics – Condensed Matter – Superconductivity
Scientific paper
2002-08-26
Physics
Condensed Matter
Superconductivity
11 pages, 6 figures, ASC2002
Scientific paper
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).
Kim Ji-hoon
Newman Nathan
Rowell John M.
Singh Rakesh K.
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