Evidence of spontaneous spin polarized transport in magnetic nanowires

Details Evidence of spontaneous spin polarized transport in magnetic nanowires Evidence of spontaneous spin polarized transport in magnetic nanowires

2003-07-11

arxiv.org/abs/cond-mat/0307284v1

Physics

Condensed Matter

Materials Science

4 pages, 3 eps figs

Scientific paper

10.1103/PhysRevLett.91.096801

The exploitation of the spin in charge-based systems is opening revolutionary opportunities for device architecture. Surprisingly, room temperature electrical transport through magnetic nanowires is still an unresolved issue. Here, we show that ferromagnetic (Co) suspended atom chains spontaneously display an electron transport of half a conductance quantum, as expected for a fully polarized conduction channel. Similar behavior has been observed for Pd (a quasi-magnetic 4d metal) and Pt (a non-magnetic 5d metal). These results suggest that the nanowire low dimensionality reinforces or induces magnetic behavior, lifting off spin degeneracy even at room temperature and zero external magnetic field.

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