Berlin 2005 – wissenschaftliches Programm
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TT: Tiefe Temperaturen
TT 8: Posters Transport
TT 8.8: Poster
Freitag, 4. März 2005, 14:00–18:00, Poster TU C
Nonequilibrium transport in nanostructured palladium-nickel alloy films — •Jakob Brauer1, Heiko B. Weber1, and Hilbert v. Löhneysen2,3 — 1Forschungszentrum Karlsruhe, Institut für Nanotechnologie — 2Forschungszentrum Karlsruhe, Institut für Festkörperphysik — 3Physikalisches Institut, Universität Karlsruhe
We investigated electronic transport properties of short nanostructured metallic bridges. Our samples consisted of short palladium-nickel alloy films contacted by thick gold electrodes acting as reservoirs, thereby establishing a nonequilibrium electronic distribution under applied bias[1]. The nickel concentration of the alloy was chosen near the onset of ferromagnetic ordering. The motivation for this was to study the interplay between electronic nonequilibrium distribution and exchange splitting. We measured the dependency of the resistance on magnetic field, bias and temperature. Our data show a zero-bias anomaly, which depends on the magnetic field in a nontrivial fashion.
[1] H.B. Weber et al., PRB 63 (2001) 165426