Identification of the high-temperature superconducting phase in the Y-Ba-Cu-O system as the perovskite {(YBa_2Cu_3)_7 _pm _delta}

摘要

The oxide responsible for high-temp. supercond. (onset .apprx.100 K, zero resistance above liq. N2 temp.) is {(YBa_2Cu_3O)_7 _pm _delta}