Enhanced Jc of MOD-YBCO Films by Modifying Surface States of CeO2 Buffer Layers on Sapphire Substrates

M. Sohma, T. Kumagai, T. Nakamura, H. Matsui, I. Yamaguchi, T. Manabe
2013 Physics Procedia  
Simple and easy treatments for the CeO 2 buffer layers on sapphire single crystal substrates were demonstrated to enhance the superconducting properties of the metalorganic YBa 2 Cu 3 O 7-y films using (i) acid solution dipping, (ii) UV light irradiation, and (iii) thermal annealing. When the CeO 2 buffer layers were exposed to UV light, water contact angles diminished drastically, however, an apparent effect on the superconducting properties was not observed. On the other hand after the
more » ... annealing at 750°C under the mixture of dry-air and N 2 gas, superconducting current density of 1.4 MA/cm 2 at 77.3K was achieved independent of treatment time.
doi:10.1016/j.phpro.2013.04.081 fatcat:6aeq4gc27rcsxacb26sgh37ace