Interaction Between Superconductivity and the Magnetic Transition in (Pr,Y)Ba₂Cu₃O_y

Abstract

Interaction between superconductivity and the anti-ferromagnetic (AFM) transition of Pr ions in Pr_xY_1−xBa₂Cu₃O_y ((Pr,Y)123) is investigated. Samples for which the AFM transition temperature (T_M) of Prions is within the superconducting transition temperature width (ΔT_C) are prepared, and the temperature dependence of their resistivity is measured in magnetic fields up to 5T. In high magnetic fields, the ρ-T curves show inflection points around T_M within ΔT_C, and T _C ^zero converges to 2K. The AFM transition is thought to affect the transport property of carriers, causing these inflections at T_M.