Title :
Y-Ba-Cu-O/Au/Nb ramp-type Josephson junctions
Author :
Smilde, Hendrik J H ; Hilgenkamp, Hans ; Gerritsma, Gerrit J. ; Blank, Dave H.A. ; Rogalla, Horst
Author_Institution :
MESA Res. Inst., Twente Univ., Enschede, Netherlands
fDate :
3/1/2001 12:00:00 AM
Abstract :
Ramp-type junctions connecting the d-wave superconductor YBa2 Cu3O7-δ and the s-wave superconductor niobium are fabricated using a thin gold layer as a chemical barrier. High critical current densities exceeding 5 kA/cm2 are obtained. The normal state resistivity (RnA) values of the junctions are of the order of 0.1 μΩ cm2. The magnetic field behavior of the critical current of junctions oriented in the [10l]- and in the [11l]-direction of the YBa2Cu3 O7-δ is explained in terms of a predominant d(x 2-y2) order parameter in the high-Tc superconductor
Keywords :
Josephson effect; barium compounds; critical current density (superconductivity); gold; high-temperature superconductors; niobium; yttrium compounds; Y-Ba-Cu-O/Au/Nb ramp-type Josephson junction; YBa2Cu3O7-Au-Nb; chemical barrier; critical current density; d-wave superconductor; high-Tc superconductor; magnetic field; normal state resistivity; order parameter; s-wave superconductor; Chemicals; Conductivity; Critical current density; Gold; Joining processes; Josephson junctions; Magnetic fields; Niobium; Superconducting epitaxial layers; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
