We have investigation the effect of Gd, Fe, Zn and Al substitutions on the tunneling characteristics of planar tunnel junctions realized on single crystals of Y-Ba-Cu-O with different concentration doping. No relevant differences have been found in the conductance characteristics vs voltage of undoped 90 K and Gd junctions, so confirming that substitution of Y by other rare-earth does not affect the material superconducting properties. A different behavior has been found for substitutions on the Cu sites. Fe, Zn and Al doped junctions show broadened gap-like structures at about +/-25 mV and disappearance of the structures at +/-5 mV, observed for the 90 K Y-Ba-Cu-O phase
INFLUENCE OF GD, FE, ZN AND AL SUBSTITUTIONS ON THE TUNNELING CHARACTERISTICS OF THE Y-BA-CU-O SYSTEM
DI LEO, Rosario;CUCOLO, Anna Maria;NIGRO, Angela;ROMANO, Paola
1994-01-01
Abstract
We have investigation the effect of Gd, Fe, Zn and Al substitutions on the tunneling characteristics of planar tunnel junctions realized on single crystals of Y-Ba-Cu-O with different concentration doping. No relevant differences have been found in the conductance characteristics vs voltage of undoped 90 K and Gd junctions, so confirming that substitution of Y by other rare-earth does not affect the material superconducting properties. A different behavior has been found for substitutions on the Cu sites. Fe, Zn and Al doped junctions show broadened gap-like structures at about +/-25 mV and disappearance of the structures at +/-5 mV, observed for the 90 K Y-Ba-Cu-O phaseI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
