The recently discovered superconductor MgB2 with Tc at 39 K has great potential in superconducting electronics. In this paper, we review the deposition techniques used for MgB2 thin films in the light of a thermodynamic study of the Mg-B system with the calculation of phase diagrams (CALPHAD) modeling technique. This thermodynamic study identifies a growth window in the pressure-temperature phase diagram, in which the magnesium pressure is very high for likely in situ growth temperatures. A Hybrid Physical-Chemical Vapor Deposition (HPCVD) technique that successfully achieves such a high Mg pressure is shown to produce in situ epitaxial MgB2 thin films with bulk superconducting properties.
|Original language||English (US)|
|Number of pages||6|
|Journal||Journal of Superconductivity and Novel Magnetism|
|State||Published - Dec 1 2003|
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics