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Superconducting thick films; highT_c phase; Bi-Sr-Ca-Cu-O film; screen printing

Thick films of Bi-Sr-Ca-Cu-O were deposited on (100) MgO substrates by screen-printing technique with the starting composition 1112. To attain the superconducting state, the films were subjected to two-step heat-treatment. R-T and XRD have been studied for films annealed at different durations of the second step. InitiallyT_c (R=0) increased from 77 to 103 K as the annealing duration was increased after whichT_c decreased. Kinetics of the growth of highT_c phase is discussed in the light of our results.

Sangeeta Chaudhry¹ Neeraj Khare¹ A K Gupta¹ K C Nagpal¹ V N Ojha¹ G S N Reddy¹ V S Tomar¹

1. Cryogenics Division, National Physical Laboratory, Dr K. S. Krishnan Road, New Delhi - 110 012, India

Published

April 1991