Measurement of Superconducting Transition under High Pressures by the Diamond Pressure Cell

Abstract

Using a diamond anvil high pressure cell, the superconducting transition temperature has been determined by a new technique. The technique is based on an a.c. bridge method, and the sensitivity is improved by shield plates of a high-T_c superconductor, by which the magnetic flux is concentrated in the sample. The technique has been applied for measurements of the superconducting transition of lead as a function of temperature and pressure.