Domain wall motion in synthetic Co2Si nanowires.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 22469009.
- Also identified by DOI 10.1021/nl204510p and PMC identifier 3493485.
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Abstract
We report the synthesis of single crystalline Co(2)Si nanowires and the electrical transport studies of single Co(2)Si nanowire devices at low temperature. The butterfly shaped magnetoresistance shows interesting ferromagnetic features, including negative magnetoresistance, hysteretic switch fields, and stepwise drops in magnetoresistance. The nonsmooth stepwise magnetoresistance response is attributed to magnetic domain wall pinning and depinning motion in the Co(2)Si nanowires probably at crystal or morphology defects. The temperature dependence of the domain wall depinning field is observed and described by a model based on thermally assisted domain wall depinning over a single energy barrier.
Medical subject headings
- Cobalt
- Nanowires
- Silicon