Tunable conductance of magnetic nanowires with structured domain walls

Details Tunable conductance of magnetic nanowires with structured domain walls Tunable conductance of magnetic nanowires with structured domain walls

2006-01-26

arxiv.org/abs/cond-mat/0601620v1

Physics

Condensed Matter

Materials Science

4 pages with 4 figures

Scientific paper

10.1103/PhysRevLett.96.047208

We show that in a magnetic nanowire with double magnetic domain walls, quantum interference results in spin-split quasistationary states localized mainly between the domain walls. Spin-flip-assisted transmission through the domain structure increases strongly when these size-quantized states are tuned on resonance with the Fermi energy, e.g. upon varying the distance between the domain walls which results in resonance-type peaks of the wire conductance. This novel phenomena is shown to be utilizable to manipulate the spin density in the domain vicinity. The domain walls parameters are readily controllable and the predicted effect is hence exploitable in spintronic devices.

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