PRESSURE DEPENDENCE OF T_c FOR HIGH-T_cCl-CONTEINED SUPERCONDUCTOR (Sr,Ca)₃Cu₂O_4+δCl_2-y

Abstract

Chlorine-containing ( Sr , Ca )3 Cu 2 O 4+δ Cl 2-y (0212- Cl ) superconductor is the high-Tc Cu -oxide superconductor (HTSC) with Tc=80 K and was synthesized under high-pressure and high-temperature. The 0212- Cl has double [ CuO 2] planes and the apical oxygen are replaced by Chlorine. We measured the resistance of 0212- Cl under high pressure using a diamond-anvil cell up to 13.3 GPa and two-terminal ac-method to investigate the pressure dependence of Tc. Tc of 0212- Cl increases gently with increasing pressure.