Numerical simulation of flux-pinning dynamics for a defect in a type-II superconductor

Masahiko Machida; Hideo Kaburaki

doi:10.1103/PhysRevB.50.1286

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Numerical simulation of flux-pinning dynamics for a defect in a type-II superconductor

Masahiko Machida, Hideo Kaburaki

DOI 10.1103/PhysRevB.50.1286 · Physical Review B

T1

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Abstract

We perform a computer simulation of the flux-pinning dynamics for a single defect under the presence of both the applied current and the external magnetic field by directly solving the time-dependent Ginzburg-Landau equation coupled with the Maxwell equation in a two-dimensional rectangular region. With one vortex flow path and a single defect, we found two types of vortex motions around the defect, which are one-flux and two-flux pinning, depending on the size of the defect. The criterion of the two-flux pinning is studied by both numerical simulation and a simplified free-energy calculation. We also present the effect of a single defect on the V-I characteristics.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown