Electron transport and magnetoresistance in ferromagnetic nanostructures
Physica Status Solidi B-Basic Research 241,10 (2004) 2404-2409;
Recent studies of very narrow Ni wires have shown that the resistance of a wire containing domain walls can be smaller than for a sample without walls; i.e., the domain wall resistance is effectively negative. In this paper we investigate the corresponding behavior of permalloy wires. For these wires the resistance decreases markedly during magnetization reversal. We show that this decrease is due to a combination of coherent rotation and a negative domain wall resistance. We are able to separate these two effects, and extract an estimate for the resistance of an individual domain wall. (C) 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
domain-wall resistance;; wires;; resistivity;; scattering;; nanowires;; alloys;; metal
Date of this Version