Preparation of high Tc and Jc films of Ba2YCu3O7 using laser evaporation of a composite target containing BaF2

DeSantolo, A. M.; Mandich, M. L.; Sunshine, S.; Davidson, B. A.; Fleming, R. M.; Marsh, P.; Kometani, T. Y.
June 1988
Applied Physics Letters;6/6/1988, Vol. 52 Issue 23, p1995
Academic Journal
High Tc and Jc superconducting films of Ba2YCu3O7 are prepared on SrTiO3 <100> substrates using pulsed excimer laser evaporation of a composite target containing BaF2, Y2O3, and CuO, followed by annealing in wet oxygen. High transition temperatures (R=0 from 89.5 to 91 K) and high critical current densities (Jc≥7×105 A cm-2) are obtained. The electrical transport properties of these films are significantly better than films previously grown via laser ablation of Ba-Y-Cu-O targets.


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