Degradation of MgB2 Thin Films by exposure to Water
Abstract
The degradation of MgB2 thin films is studied by submerging MgB2 films (in situ grown by Hybrid Physical-Chemical Vapor Deposition) into de-ionized water at different temperatures. The thickness, room temperature resistance, and superconducting transition were measured as a function of time in water and the temperature of the water. Results showed that the films degrade faster at room temperature than at zero degree Celsius. The room temperature resistance increases with time. The thickness of the MgB2 films decreases quickly initially, but the speed of the thickness decreases with time. The resultant material is not crystaline according to x-ray diffraction. Both the T_c(onset) and the T_c(zero-resistance) decrease with time, while the superconducting transition becoming broader.
- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- March 2004
- Bibcode:
- 2004APS..MARW13012C