Simulations of vortex dynamics in superconducting films with pinning array

We investigated the vortex dynamics in type-II superconducting films with a pinning array by simulating equations of motion for vortices. The 2D vortex system in the presence of a pinning array exhibits complicated dynamic behavior dependent on the vortex–pin interaction and the relationship between...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2000-07, Vol.284, p.899-900
Main Authors: Kato, Ryuzo, Enomoto, Yoshihisa
Format: Article
Language:English
Subjects:
Current–voltage characteristics
Noise power spectrum
Pinning array
Vortex dynamics
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Summary:We investigated the vortex dynamics in type-II superconducting films with a pinning array by simulating equations of motion for vortices. The 2D vortex system in the presence of a pinning array exhibits complicated dynamic behavior dependent on the vortex–pin interaction and the relationship between the vortex lattice structure and pinning array. To analyze such complicated vortex dynamics, we have calculated the voltage noise due to the vortex motion for various situations. It is found that in the 2D system the critical current is sensitive to the period of a pinning array and depends on it. The noise power spectrum exhibits both broad and narrow band noise behavior only when vortices are pinned strongly.
ISSN:0921-4526
1873-2135
DOI:10.1016/S0921-4526(99)02215-2