Volume 68, Number 2, October 2004
|Page(s)||268 - 274|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 October 2004|
Absence of weak electron localization in ferromagnetic cobalt wires
Institut für Physik, Experimentalphysik, Universität Duisburg-Essen 47048 Duisburg, Germany
Accepted: 19 August 2004
We have investigated the low-temperature resistance behavior and the magnetoresistance of single-domain cobalt wires of 400 length, 2 width and thicknesses between 5 and 32. A logarithmic resistance increase is observed for temperatures which is consistently explained as originating from enhanced electron-electron interactions (EEI) in two dimensions rather than from weak electron localization (WEL). The results are confirmed for both platinum-capped and un-capped cobalt wires of various thicknesses. Our experimental results are compared with recent theoretical predictions for 2-dimensional ferromagnetic systems.
PACS: 73.61.-r – Electrical properties of specific thin films / 75.60.Ej – Magnetization curves, hysteresis, Barkhausen and related effects / 75.60.Ch – Domain walls and domain structure
© EDP Sciences, 2004
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