Radiation response of magnetron sputtered NbN films

✍ Scribed by R. Herzog; H.W. Weber; R.T. Kampwirth; K.E. Gray; H. Gerstenberg

• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 307 KB
• Volume: 165-166
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/s0921-4526(09)80319-0

✦ Synopsis

NbN films have been exposed to reactor neutron irradiation at 4.6 K to a fluence of 5.3xl0 22 . m-2 (E. >. 0.1. MeV). The critical current densities were measured at 4.2 K in magnetic fields up to 23.T prior to irradiation, after S.X irradiation following a transfer at 77. K and again after an annealing cycle to room temperature. The results show an identical field dependence of J c up to 15 T in all three cases and radiation-induced enhancements at higher fields. The latter is explained quantitatively by the observed (small) increase of the upper critical fields H c2 .