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Nano Lett. 2013 Mar 13;13(3):1106-10. doi: 10.1021/nl3044585. Epub 2013 Feb 22.

Large magnetoresistance of nickel-silicide nanowires: non-equilibrium heating of magnetically-coupled dangling bonds.

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1
Department of Electrical Engineering, Arizona State University, Tempe, Arizona 85287-5706, United States.

Abstract

We demonstrate large (>100%) time-dependent magnetoresistance in nickel-silicide nanowires and develop a thermodynamic model for this behavior. The model describes nonequilibrium heating of localized spins in an increasing magnetic field. We find a strong interaction between spins but no long-range magnetic order. The spins likely come from unpaired dangling bonds in the interfacial layers of the nanowires. The model indicates that although these bonds couple weakly to a thermal bath, they dominate the nanowire resistance.

PMID:
23421719
DOI:
10.1021/nl3044585
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