Preparation of superconducting HgBa2CaCu2Ox and Hg0.8Bi0.2Ba2CaCu2Ox films by means of annealing of mercury-free precursor films

HgBa2CaCu2Ox films and Hg0.8Bi0.2Ba2CaCu2Ox films were prepared by means of annealing of mercury-free precursor films with the Hg-1212 bulks in an evacuated quartz tube. The mercury-free precursor films were deposited by laser ablation on (100) SrTiO3 substrates. The annealed films exhibited the (00n) oriented X-ray diffraction pattern of the Hg-1212. The superconducting transition temperatures, Tc(ϱ=0), are 121 K and 100 K respectively.