Flux noise resulting from vortex avalanches using a simple kinetic model
- Department of Physics, The Ohio State University, Columbus, Ohio 43210 (United States)
We have carried out a model calculation of the flux noise produced by vortex avalanches in a type-II superconductor, using a simple kinetic model proposed by Bassler and Paczuski. Over a broad range of frequencies, we find that the flux noise S{sub {Phi}}({omega}) has a power-law dependence on frequency, S{sub {Phi}}({omega}){approximately}{omega}{sup {minus}s}, with s{approximately}1.4 in reasonable agreement with experiment. In addition, for small lattices, the calculated S{sub {Phi}}({omega}) has a high-frequency knee, which is seen in some experiments, and which is due to the finite lattice size. Deviations between calculation and experiment are attributed mostly to uncertainties in the measured critical current densities and pinning strengths of the experimental samples. {copyright} {ital 1999} {ital The American Physical Society}
- OSTI ID:
- 686566
- Journal Information:
- Physical Review, B: Condensed Matter, Vol. 60, Issue 13; Other Information: PBD: Oct 1999
- Country of Publication:
- United States
- Language:
- English
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