Physics – Condensed Matter – Superconductivity
Scientific paper
2007-08-07
Physics
Condensed Matter
Superconductivity
7 pages and 3 figures submitted to Applied Physics Letters
Scientific paper
10.1063/1.2783227
We have studied the annealing effect in transport properties of High temperature Josephson Junctions (HTc JJ) made by ion irradiation. Low temperature annealing (80 degrees Celsius) increases the JJ transition temperature (TJ) and the Ic.Rn product, where Ic is the critical current and Rn the normal resistance. We found that the spread in JJ characteristics can be lowered by sufficient long annealing times. Using random walk numerical simulations, we showed that the characteristic annealing time and the evolution of the spread in JJ characteristics can be explained by a vacancy-interstitial annihilation process rather than by an oxygen diffusion one.
Bergeal Nicolas
Bernard Rémi
Briatico Javier
Faini Giancarlo
Lesueur Jerome
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