A Simple System to Measure Superconducting Transition Temperature at High Pressure

A simple hydride system is fabricated to measure the superconducting transition temperature T_c under high pressure using a diamond anvil cell (DAC). The system is designed with centrosymetric coils around the diamond that makes it easy to keep balance between the pick-up coil and the inductance coil, while the superconducting states can be modulated with a low-frequency small external magnetic field. Using the device we successfully obtain the Tc evolution as a function of applied pressure up to 10GPa for YBa₂Cu₃O_6+δ superconductor single crystal.