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| Home > Publications database > Flux transport in nanostructured high-Tc films at microwave frequencies |
| Journal Article | PreJuSER-22627 |
; ; ; ;
2012
North-Holland Physics Publ.
Amsterdam
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Please use a persistent id in citations: doi:10.1016/j.physc.2011.12.018
Abstract: The understanding of flux transport in micro-and nanostructured superconducting systems that are exposed to an electromagnetic field at microwave frequencies is of interest for basic aspects of vortex matter and for potential application of superconductivity in fluxonic devices. We report on the combination of dc and microwave electronic measurements on submicron-patterned high-T-c films. The frequency dependence of the forward transmission coefficient S-21 indicates that the mechanism of flux transport depends on the velocity of vortices. At low frequencies, flux transport via Abrikosov vortices is present leading to additional microwave losses. Above a geometrically defined frequency, a different, loss-free mechanism seems to be responsible for flux transport. This mechanism most likely represents a phase-slip type of mechanism. The limiting vortex velocity obtained from the frequencies dependence of the microwave properties agrees with the Larkin-Ovchinnikov critical vortex velocity determined via dc pulse measurements. In spite of the change of mechanism, guidance of flux persists in these nano-patterns up to high frequencies. (C) 2012 Elsevier B.V. All rights reserved.
Keyword(s): J ; Vortex matter (auto) ; Vortex manipulation (auto) ; Critical velocity of vortices (auto) ; Antidots (auto) ; High-T-c films (auto)
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