Title :
Tunneling study of epitaxial YBa2Cu3Ox superconducting films
Author :
Boguslavsky, Yu M. ; Rudenko, E.M. ; Mukhortov, V.M.
Author_Institution :
Inst. of Metal Phys., Acad. of Sci., Kiev, Ukrainian SSR, USSR
fDate :
3/1/1991 12:00:00 AM
Abstract :
Planar and edge-type YBa2Cu3Ox-metal (Pb, Pt, In) tunnel junctions based on epitaxial Y-Ba-Cu-O films have been studied. The conductance characteristics of these junctions, particularly the conductance zero bias anomalies, have been considered. A difference between the Rd(V) dependences was observed for two types of the contacts at low bias voltages V≲5 mV. This difference was probably associated with an anisotropy of the state density N(∈) in the near-contact region of YBa2Cu3Ox. The existence of a correlation in the temperature dependences of the state density of YBa2Cu3Ox along the Cu-O planes and perpendicular to them has been observed
Keywords :
barium compounds; electronic conduction in insulating thin films; high-temperature superconductors; indium; lead; platinum; superconducting epitaxial layers; superconducting junction devices; superconductive tunnelling; yttrium compounds; Cu-O planes; YBa2Cu3O-In; YBa2Cu3O-Pb; YBa2Cu3O-Pt; anisotropy; conductance characteristics; conductance zero bias anomalies; edge-type tunnelling junctions; high-temperature superconductors; planar-type tunnelling junctions; state density; superconducting epitaxial layers; Anisotropic magnetoresistance; Crystallization; High temperature superconductors; Needles; Radio frequency; Substrates; Superconducting films; Temperature dependence; Temperature distribution; Tunneling;
Journal_Title :
Magnetics, IEEE Transactions on
