Incoherent magnetization reversal in nanowires

R. Skomski, H. Zeng, D. J. Sellmyer

Research output: Contribution to journalConference article

37 Scopus citations

Abstract

The hysteresis of very thin Fe, Co, and Ni nanowires is investigated by model calculations. The considered wires are electrodeposited into self-assembled porous anodic alumina and characterized by wire diameters down to less than 10 nm. The diameter of the wires is smaller than the coherence diameter and therefore favors coherent rotation as compared to curling, but due to imperfections the reversal mode is localized. The localization length is calculated as a function of the wire inhomogenity, and it is shown that the localization reduces both the coercivity and the thermal activation volume (Barkhausen volume). The present calculation provides a semiquantitative explanation of the wires' experimental behavior.

Original languageEnglish (US)
Pages (from-to)175-180
Number of pages6
JournalJournal of Magnetism and Magnetic Materials
Volume249
Issue number1-2
DOIs
StatePublished - Aug 2002
EventInternational Workshop on Magnetic Wires - San Sebastian, Spain
Duration: Jun 20 2001Jun 22 2001

Keywords

  • Anisotropy
  • Coercivity
  • Magnetic viscosity
  • Nanowires
  • Transition metals

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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