Nuclear-spin evidence of insulating and antiferromagnetic state of CuO2 planes in superconducting Pr2Ba4Cu7O15− δ

S Nishioka, S Sasaki, S Nakagawa… - Applied Physics …, 2022 - iopscience.iop.org
In contrast to the" Pr-issue" that neither PrBa 2 Cu 3 O 7 (Pr123) nor PrBa 2 Cu 4 O 8 (Pr124)
shows superconductivity (SC), we have observed 100%-fraction of SC in an oxygen …