Observation of the Reverse ac Josephson Effect in Y-Ba-Cu-O at 240 K

J. T. Chen; L. E. Wenger; C. J. McEwan; E. M. Logothetis

doi:10.1103/PhysRevLett.58.1972

Observation of the Reverse ac Josephson Effect in Y-Ba-Cu-O at 240 K

J. T. Chen, L. E. Wenger, C. J. McEwan, and E. M. Logothetis

Phys. Rev. Lett. 58, 1972 – Published 11 May 1987

Abstract

A two-step resistive transition, one beginning at 240 K and the other at 90 K, has been observed in Y-Ba-Cu-O compounds. The superconductivity, possibly in granular form, at both temperatures has been verified by means of the rf-to-dc conversion associated with the ac Josephson effect.