NbN superconducting thin films have been grown by using pulsed laser ablation in a N2pure atmosphere. The X-ray spectra indicate that highly oriented superconducting NbN films having a FWHM of the 002 reflection narrower than 0.5°, has been obtained. Critical zero resistance temperature Tchigher than 16.3 K and resistivity ratio ≈ 1.3 were measured as well as critical field of 12 T at LHe temperature on the high quality films. Transport critical current density Jc, measured on a patterned film with a 50 μN cm criteria, gave an extrapolated value of Jc0higher than 1 × 107A/cm2computed by using a Kim Andersen model. Preliminary photoemission spectroscopy measurements in the presence of N2background gas indicate some reactivity in the plume region.
All Science Journal Classification (ASJC) codes
- Surfaces, Coatings and Films
Boffa, V., Gambardella, U., Marotta, V., Morone, A., Murtas, F., Orlando, S., & Parisi, G. P. (1996). NbN superconducting thin films grown by pulsed laser ablation. Applied Surface Science, 106, 361 - 364. https://doi.org/10.1016/S0169-4332(96)00432-1