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Superconductor thin films; laser ablation

Superconducting thin films of Y₁Ba₂Cu₃ O_{7 −x} have been deposited on (100) Y-ZrO₂ substrates by pulsed excimer laser ablation from anunreacted mixture of Y₂O₃, BaCO₃ and CuO. The films deposited at substrate temperature of 680°C and oxygen partial pressure of 200 mtorr were found to be superconducting with zero resistive transition temperature of 89 K and critical current density of over 3 × 10⁵ A/cm² at 77 K. These results are compared with those obtained by laser ablation from a sintered superconducting pellet.

R D Vispute¹ R R Rao¹ Sucheta Gorwadkar^{1 2} S A Gangal^{1 2} S B Ogale¹

1. Department of Physics, Centre for Advanced Studies in Materials Science and Solid State Physics, Pune - 411 007, India
2. Department of Electronics Science, University of Poona, Pune - 411 007, India

Published

August 1992

Manuscript received

10 December 1991

Manuscript revised

3 April 1992