Pressure effects on the superconductivity of Tl-2223 crystals*

This study investigates the application of high pressure on the superconducting properties of a thallium-based cuprate namely Tl$_{2}$Ba$_{2}$Ca$_{2}$Cu$_{3}$O$_{10 +\delta}$ (Tl-2223). The superconducting transition temperature (T$_{c}$) and the critical current density (J$_{c}$) were studied by applying 0.8 GPa of pressure. The pressure was applied in a piston-cylinder-cell (PCC), using Pb as manometer and Daphne 7373 oil as the pressure transmitting medium. For estimating the J$_{c}$, we used the Bean’s critical state formula on the magnetic hysteresis curves obtained at 10 K and 20 K. Both the T$_{c}$ and J$_{c}$ shifted with pressure, clearly indicating that pressure is another tool to control properties of quantum materials.