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NdBa2Cu3O7 bicrystal Josephson junctions and SQUIDs operating at 77 K

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6 Author(s)
Romans, E.J. ; Dept. of Phys. & Appl. Phys., Strathclyde Univ., Glasgow, UK ; Eulenburg, A. ; Carr, C. ; Millar, A.J.
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Recently there has been considerable interest in the use of NdBa 2Cu3O7 (NBCO) as an alternative thin-film material to YBa2Cu3O7 (YBCO) for device applications. This is due to the its potentially superior surface and structural properties. However the development of NBCO Josephson junctions and superconducting quantum interference devices (SQUIDs) has been found difficult worldwide due to the degradation in the transition temperature upon patterning. This effect appears to be target dependent. By careful patterning and annealing of samples we have been able to obtain working NBCO Josephson junctions and SQUIDs at 77 K. Here we report on their electrical and noise characteristics

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Applied Superconductivity, IEEE Transactions on  (Volume:11 ,  Issue: 1 )