ANOMALOUS PRESSURE DEPENDENCE OF THE SUPERCONDUCTING TRANSITION TEMPERATURE OF SR2CUO2F2+DELTA

摘要

We have measured the pressure dependence of the superconducting transition temperature of Sr2CuO2F2+delta to 5 kbar using He as the pressure medium. Qualitatively different derivatives are obtained for pressure changes at 300 K and 50 K with the anomalous result that the 50 K value is negative instead of the usual small positive value seen for other copper-oxide based materials. [References: 11]