Theory of the longitudinal vortex-shaking effect in superconducting strips

Grigorii P. Mikitik; Ernst Helmut Brandt

doi:10.1103/PhysRevB.67.104511

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Theory of the longitudinal vortex-shaking effect in superconducting strips

Grigorii P. Mikitik, Ernst Helmut Brandt

DOI 10.1103/PhysRevB.67.104511 · Physical Review B

T1

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Abstract

We show that for a thin superconducting strip placed in a perpendicular dc magnetic field—the typical geometry of experiments with high-Tc superconductors—the application of a weak ac magnetic field along the strip (i.e., perpendicular to the dc field and parallel to the circulating critical currents) generates a dc voltage in the strip, which causes the critical currents and irreversible magnetic moment to relax completely. This relaxation process is not due to thermally activated flux creep but to the drift of vortices towards the center of the strip under the influence of the ac field. This longitudinal vortex-shaking theory supplements our previous theory of transverse vortex shaking where the ac field was perpendicular to the irreversible currents. Together, both theories clarify the nature of the vortex-shaking effect in real superconducting samples of finite length.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7 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