130‐K Superconductivity in the Hg‐Ba‐Ca‐Cu‐O System
(Hg0.9Re0.1)Ba2Ca2Cu3 O8+δ(HgRe‐1223) HTSC thin films have been prepared by pulsed laser deposition (PLD) of a precursor on (100)‐oriented SrTiO3 substrates followed by annealing in a controlled mercury atmosphere. The critical temperature is 129 K determined by the temperature dependence of AC susceptibility. Resistance measurements show a superconducting transition at Tc= 130 K with transition width ΔTc ≈ 3 K.