Grain orientation of the YBa 2Cu 3O y superconducting thin films prepared by the low pressure plasma flash evaporation technique and its dependence on the starting composition

Abstract

Listen

Translate article

We have prepared superconducting thin films on MgO(100) substrates by a deposition technique using low pressure plasma flash evaporation. The r.f. plasma was sustained under 20 Torr by a 13.56 MHz r.f. generator operated at 8 kW. The films show various grain orientations depending on the conditions of deposition. With some modifications in the starting material composition, superconducting properties of the best film achieved were T c (resistivity ϱ = 0) = 90 K and J c ( at 77 K and zero field) = 1.7 × 10 5 A cm 2.