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

T. Kim, Ralph Chamberlin, J. P. Bird

Research output: Contribution to journalArticle

6 Citations (Scopus)

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.

Original languageEnglish (US)
Pages (from-to)1106-1110
Number of pages5
JournalNano Letters
Volume13
Issue number3
DOIs
StatePublished - Mar 13 2013

Fingerprint

Dangling bonds
Magnetoresistance
Nanowires
nanowires
Nickel
nickel
Heating
heating
baths
Thermodynamics
Magnetic fields
thermodynamics
magnetic fields
nickel silicide

Keywords

  • heat transfer in nanostructures
  • interfacial spins
  • magnetoresistance
  • nanomagnetism
  • nanostructured silicides
  • Self-assembled nanowires

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanical Engineering

Cite this

Large magnetoresistance of nickel-silicide nanowires : Non-equilibrium heating of magnetically-coupled dangling bonds. / Kim, T.; Chamberlin, Ralph; Bird, J. P.

In: Nano Letters, Vol. 13, No. 3, 13.03.2013, p. 1106-1110.

Research output: Contribution to journalArticle

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AB - 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.

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KW - nanostructured silicides

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