Josephson effects in the Ba-Y-Cu-O compounds

Journal Article · Mon May 11 04:00:00 EDT 1987 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.58.1979· OSTI ID:6615850

Tsai, J S; Kubo, Y; Tabuchi, J

A point-contact Josephson junction between a bulk Ba-Y-Cu-O (BYCO) compound (T/sub c/--90 K) and a Nb needle has been made. The I-V characteristics under microwave radiation show Shapiro steps, confirming the Josephson nature of the formed contact. Spin-singlet superconductivity in Ba-Y-Cu-O system is implied from the voltage of the steps. The temperature dependence of the critical currents suggests that the Josephson junction is formed between Nb and another material with much higher T/sub c/. Internal Josephson structure within the bulk ceramics is not found in the Ba-Y-Cu-O system.

• Research Organization: Microelectronics Research Laboratories, NEC Corporation, Kawasaki, Japan
• OSTI ID: 6615850
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 58:19; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
COPPER COMPOUNDS
CRITICAL CURRENT
CURRENTS
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ELEMENTS
JOSEPHSON EFFECT
JOSEPHSON JUNCTIONS
JUNCTIONS
LOW TEMPERATURE
METALS
MICROWAVE RADIATION
NIOBIUM
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RADIATIONS
SUPERCONDUCTING JUNCTIONS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
YTTRIUM COMPOUNDS