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Evolution of Electrical and Electrodynamic Properties of {\rm YBa}_{2}{\rm Cu}_{3}{\rm O}_{7-{\rm x}} Bicrystal Josephson Junctions With Oxygen Loading

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6 Author(s)
I. I. Gundareva ; Kotel'nikov Institute of Radio Engineering and Electronics of RAS, Moscow, Russian Federation ; O. Y. Volkov ; M. V. Lyatti ; Y. Y. Divin
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The I-V curves and dynamic resistances Rd (V) of [001]-tilt YBa2Cu3O7-x bicrystal Josephson junctions have been experimentally studied at various levels of oxygen loading. Oxygen content was modified by annealing in ozone atmosphere, in vacuum or in air. Deviations of the IV -curves from those predicted by the RSJC model in the form of additional nonlinearities at the middle and high voltages were found to decrease after enhancement of oxygen content in junctions. Electrodynamic properties of Josephson junctions were analyzed using log-periodic YBa2Cu3O7-x antennas, integrated with the junctions. Fine structures on the IV-curves, related to antenna resonances, were modified with oxygen content due to better antenna-junction coupling and lower electromagnetic losses in YBa2Cu3O7-x film.

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IEEE Transactions on Applied Superconductivity  (Volume:21 ,  Issue: 3 )