Fluxon viscosity in high-Tc superconductors

Michael Golosovsky; Yehuda Naveh; Dan Davidov

doi:10.1103/PhysRevB.45.7495

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Fluxon viscosity in high-Tc superconductors

Michael Golosovsky, Yehuda Naveh, Dan Davidov

DOI 10.1103/PhysRevB.45.7495 · Physical Review B

T1

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Abstract

We present a phenomenological model for the frequency-dependent fluxon complex resistivity in which the fluxon viscosity η is a central parameter. We use the high-frequency limit of this model to extract η from microwave transmission measurements through thin superconducting films in the presence of a magnetic field. The measured value of η allows a critical check of the model at low frequencies. The viscosity is anisotropic and consistent with anisotropic effective mass ratios of γ=(mc/ma)1/2=5–8 for Y-Ba-Cu-O and γ=12–15 for Bi-Sr-Ca-Cu-O.

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.	85	Pressure not reported	unknown
Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	80	Pressure not reported	unknown