Speaker
Description
Bulk single crystals of EuBCO superconductors with different Eu$211$ phase contents were prepared. Higher growth rates in the growth temperature window than usual were used to grow bulk EuBCO crystals, and the Eu$211$ phase content in the samples was varied from $21.7$ to $32.2$ wt.$\%$.
Measurements of local superconducting properties (transition temperature, critical current density at $77$ K) and macroscopic superconducting properties (trapped magnetic field and levitation force at $77$ K) of the prepared materials were performed. The microstructure of the samples was studied by polarized light microscopy and scanning electron microscopy. The influence of different Eu$211$ phase contents, growth rates, resulting sizes and volume fraction distributions of Y$211$ particles on the measured superconducting properties was shown.
Acknowledgment
This work was supported by Slovak Grant Agency APVV-17-0625, APVV-21-0387, VEGA 2/0094/22. The work was created at the Institute of Experimental Physics of the SAS as part of the project solution SAS Return Project Scheme 2025.
