Superconductivity in Pr_(2-z)Ce_zSr_2Cu_2NbO_(10) and in Gd_(2-z)Ce_zSr_2Cu_2RuO_(10)

摘要

The detection of granular superconductivity in Pr222Nb-10 lead to the conclusion that R_(2-z)Ce_zCuO_4 (R21-4) compounds and R_(2-z)Ce_zSr_2Cu_2NbO_(10) (R222Nb-10) compounds both superconduct for R chemical bounds Pr. The fact that Cd21-4 does not superconduct, but Gd222Nb-10 does, indicates that the superconducting layers are different in the two classes of compounds. magnetic resonance studies of gd222Ru-10 and Gd21-4 indicate either that ordered magnetism and superconductivity co-exist in the cuprate-planes or else that the cuprate-planes are not the primary superconducting layers in Gd222Ru-10.