Naslov
Nonlocal Vortex Dynamics in Narrow Superconducting Channels

Autori
Helzel, Andreas ; Kokanović, Ivan ; Babić, Dinko ; Strunk, Christoph

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Deutsche Phyisikalische Gesellschaft Fruehjarstagung des Arbeitskreises Festkoerperphysik, Dresden 2006. / Dr. André Wobst - Dresden : Deutsche Phyisikalische Gesellschaft Fruehjarstagung des Arbeitskreises Festkoerperphysik, 2006

Skup
Deutsche Phyisikalische Gesellschaft Fruehjarstagung des Arbeitskreises Festkoerperphysik, Dresden 2006.

Mjesto i datum
Dresden, Njemačka, 26.03.2006. - 31.03.2006

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
Vortex Dynamics; Superconductors; Superconducting microstructures

Sažetak
We investigated superconducting microstructures composed of a vertical wire crossed by two horizontal wires. In presence of an external magnetic field, a supercurrent in the upper horizontal wire drives a flow of vortices in the vertical wire. This results in a nonlocal voltage response in the lower wire [1]. We use very low pinning amorphous NbGe as superconductor, resulting in a 100 times larger nonlocal response compared to [1] and a moderate decrease when varying the channel length between 2 and 5 &micro ; m. Comparing with the local flux flow properties, we observe that the nonlocal flux flow is maximal around the irreversibility line of plain NbGe wires and extends up to Bc2. In the regime of very few vortex rows in the channel reproducible fluctuations occur in the nonlocal signal, which can be understood as jamming effects near the detector cross. [1] Grigorieva et. al., Phys. Rev. Lett. 92, 237001 (2004)

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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