Effects of Cation Partial Substitution for Hg Site of Hg1223 on Superconducting Properties

Abstract

Hg-based superconductors, Hg_0.8M_0.2Ba₂Ca₂Cu₃O_y (Hg (M) 1223; M=Cr, Mo, W, In, Ru and Sn) were prepared using a high pressure technique and their superconducting properties, T_c and B_irr, were investigated. Nearly single-phase samples of Hg (M) 1223 (M=Cr, Mo, In and Ru) were obtained by heating at 1000-1100°C for 1-4h under 6GPa. T_c of the substituted samples was lower than 135K. Enhancement in B_irr was observed in Hg (Ru) 1223. A possible explanation for this phenomenon was proposed.