ESR Investigations of (BaSnO3)x/(Cu, Tl) 1223 composite in the normal and superconducting state

(BaSnO3)x/Cu0.5Tl0.5Ba2Ca2Cu3O10-δ superconducting composites (0.00 ≤ x ≤ 1.50 wt.%) were prepared by the solid-state reaction technique. The crystalline structure and superconducting transition te...