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Flux-flow behaviors on a Bi2Sr2CaCu2O8+δ (Bi-2212) stack

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3 Author(s)
Sang-Jae Kim ; Department of Mechatronics, Cheju National University, Cheju 690-756, Korea ; Hatano, T. ; Blamire, Mark

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We investigated long intrinsic Josephson junctions (IJJs) as an oscillator on a Bi2Sr2CaCu2O8+d (Bi-2212) whisker. The oscillator utilizes the effect of flux-flow motion in long IJJs. In-plane areas with the same junction geometry, 15×1.7 μm2 were fabricated by using a three-dimensional focused-ion-beam (FIB) etching method. Those oscillator junctions exhibited uniform multibranch structures and clearly upturned curves under He. The flux-flow velocities (Vff) reached 8.7×105 m/s at 6.2 T and 10 K. We describe the characteristic flux-flow behaviors on long IJJs for high-frequency device applications.

Published in:

Journal of Applied Physics  (Volume:103 ,  Issue: 7 )