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Flux motion in YBCO biepitaxial Josephson junctions

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4 Author(s)
Sung, H.H. ; Dept. of Electr. Eng., Da-Yeh Univ., ChangHua, Taiwan ; Yang, S.Y. ; Horng, H.E. ; Yang, H.C.

We have measured the current-voltage characteristics of overdamped long YBa/sub 2/Cu/sub 3/O/sub 7/ biepitaxial Josephson junctions. The velocity-matching step was observed in the current-voltage characteristics with an applied magnetic field. The presence of velocity-matching steps suggests that the biepitaxial Josephson junction is formed around a dielectric-like barrier between superconducting grains. Anomalous subharmonic voltage steps were found under microwave irradiation. The relations between anomaly steps and fluxon motion are discussed.

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Applied Superconductivity, IEEE Transactions on  (Volume:9 ,  Issue: 2 )