Naslov
Transversal Flux-Transformer Effect in Narrow Superconducting Channels of a-Nb0.7Ge0.3

Autori
OTTO, F. ; FRISCH, M. ; HELZEL, A. ; BILUŠIĆ, Ante ; D. BABIĆ, Dinko ; SURGERS, C. ; STRUNK, C.

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

Izvornik
Frühjahrstagungen der Deutschen Physikalischen Gesellschaft (DPG) / - Regensburg, 2007

Skup
Frühjahrstagungen der Deutschen Physikalischen Gesellschaft (DPG)

Mjesto i datum
Regensburg, Njemačka, 26.03.2007. - 30.03.2007

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
vortex transport; amorphous Nb0.7Ge0.3

Sažetak
We study nonlocal vortex transport in mesoscopic amorphous Nb0.7Ge0.3 samples. A dc current I is passed through a wire connected via a perpendicular channel, of a length L = 2 - 5 mikro metra and width w = 0.1 - 2 mikro metra, with a pair of voltage probes where a nonlocal response Vnl/I is measured. In our low-pinning a-Nb0.7Ge0.3, the effect appears in more than half of the superconducting phase diagram, i.e. everywhere where the vortices can be moved easily enough to induce dissipation at very low currents. The maximum of Rnl = Vnl/I for a given temperature occurs at an L-independent magnetic field and is proportional to 1/L. The influence of the vortex-matter viscosity alone is more easily studied in the limit T->Tc, where pinning effects are negligible. We present a detailed study of the T- and w-dependence of the effect.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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