Vortex rectification effects in plain superconducting films

Details Vortex rectification effects in plain superconducting films Vortex rectification effects in plain superconducting films

2004-05-27

arxiv.org/abs/cond-mat/0405656v1

Physics

Condensed Matter

Superconductivity

15 pages, 4 figures, PDF file

Scientific paper

Superconducting films in perpendicular magnetic field are found to rectify alternating currents. The effect has been observed both in plain and nanostructured superconducting films (niobium and lead). The rectified voltage appears both along and transverse to alternating current and strongly depends on the magnetic field. Rectification phenomena is based on the property of superconductors to have permanent circulating currents in magnetic field (vortices) and to develop electric fields at high enough currents. In contrast to previous findings, at higher current frequencies no asymmetric pinning sites are needed to produce rectification and related guided flux motion.

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