YBCO microwave resonators for strong collective coupling with spin ensembles

Alberto Ghirri, Claudio Bonizzoni, Dario Gerace +3

Coplanar microwave resonators made of 330 nm-thick superconducting YBCO have been realized and characterized in a wide temperature ($T$, 2-100 K) and magnetic field ($B$, 0-7 T) ra…