Synthesis of superconducting Pb-doped HgBa2CaCu2O<i>y</i> films by laser ablation and post-annealing

Abstract

Superconducting Pb-doped HgBa2CaCu2Oy films have been successfully synthesized on the (100) SrTiO3 substrate by laser ablation using a Pb-doped Hg-1212 target and post-annealing. The as-deposited film was post-annealed with a pellet of the same powders as those of the target at 760 °C for 20 min in an evacuated quartz tube. The obtained film exhibited the (00n) oriented x-ray diffraction pattern of the Hg-1212. The superconducting transition temperature, Tczero, was 117 K. Anisotropy of magnetization, M(T) and M-H curves in the directions of two different fields was confirmed.