C-axis oriented high temperature superconductors deposited onto single crystals of gadolinium gallium garnet and method of making the same

摘要

c-axis oriented microwave quality HTSC films are deposited onto single crystals of gadolinium gallium garnet (GGG) using pulsed laser deposition (PLD) with conditions of 85 mTorr of oxygen partial pressure, a block temperature of 730 DEG C., a substrate surface temperature of 790 DEG C. and a laser fluence of 1 to 2 Joules/cm2 at the target, a laser repetition rate of 10 Hz and a target to substrate distance of 7 cm and in which the a and b lattice parameters of the GGG exhibit a mismatch of less than 2.5 percent with the a and b lattice parameters of the HTSC.