In situ Ag/YBa2Cu3O7 contacts for superconductor–normal-metal–superconductor devices
R. P. Robertazzi, A. W. Kleinsasser, R. B. Laibowitz, R. H. Koch, K. G. Stawiasz
DOI 10.1103/PhysRevB.46.8456 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
By use of a completely in situ process, we have investigated Ag metal contacts to thin films of YBa2Cu3O7 (YBCO), in order to study the properties of the Ag/YBCO interface as well as the Josephson effect in SNS bridges made with this technique. Measurements of the temperature dependence of the Josephson current in these devices have been made, and are compared to recent theoretical predictions. SNS devices which exhibited Josephson effects had the critical current–resistance (IcRn) products of the junctions limited by the high specific contact resistance of the SN interfaces. The lowest values of the specific contact resistance obtained were on the order of 10−8 Ω cm2 for contacts in the c-axis direction. The specific contact resistance was measured as a function of deposition conditions for the Ag as well as annealing temperature and time. The influence of the specific contact resistance on the magnitude of the Josephson current in SNS bridges is discussed, and a review of the contact literature for noble-metal/YBCO contacts is presented.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | onset |
Similar papers
Conductivity peak, relaxation dynamics, and superconducting gap of YBa2Cu3O7 studied by terahertz and femtosecond optical spectroscopies
similarity 0.96A. Frenkel et al.
Source status unknown — claims are unverified
Y-Ba-Cu-O/Dy-Ba-Cu-O superlattices: A first step towards the artificial construction of high-Tc superconductors
similarity 0.95J.-M. Triscone et al.
Source status unknown — claims are unverified
High-field measurements on the high-Tc superconductors La1.85Sr0.15CuO4−δ and YBa2Cu3O7−δ
similarity 0.94P. J. M. van Bentum et al.
Source status unknown — claims are unverified
Magnetotransport study of intra- and intergrain transitions in the magnetic superconductors RuSr2GdCu2O8 and RuSr2(Gd1.5Ce0.5)Cu2O10
similarity 0.94S. García et al.
Source status unknown — claims are unverified
Structural and superconducting properties of R1−xCaxBa2Cu3O7−δ with 0.50>~x>~0.00
similarity 0.94A. Sedky et al.
Source status unknown — claims are unverified
Superconductor-insulator transition and the size effect on transport properties observedin ultrathin Y0.9Pr0.1Ba2Cu3Oy films
similarity 0.94U. Kabasawa et al.
Source status unknown — claims are unverified