Fabrication and characterization of (HgRe)Ba2Ca1Cu2Oy thin films

Thin films of (HgRe)Ba2Ca1Cu2Oy (HgRe1212) superconductor were fabricated o n Ag and LaAlO3 (LAO) by reacting laser deposited ReBaCaCuO precursor films with CaHgO2 in sealed reaction tubes. The phase purity and superconducting properties of final films depended significantly on the thickness of the p recursor films. The minimum thickness of precursor films for complete conve rsion to HgRe1212 phase was observed to be about 800 nm, The HgRe1212 films deposited and reacted under optimum conditions, on both Ag and LAO, showed excellent c-axis texture. Magnetization measurements of the as reacted sup erconducting films showed T-c values of 122-128 K, and exhibited open hyste resis loops up to 110 K.