Micromagnetic analysis of unusual, V-shaped domain transitions in MnAs nanowires

R. Engel-Herbert, T. Hesjedal

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

V-shaped domain transitions in αMnAs nanowires were investigated by micromagnetic simulations. These rather unusual domain patterns are commonly observed experimentally by surface-sensitive magnetic imaging techniques. It has been speculated that the accompanying inclined domain walls in MnAs are the result of either an exchange biasing effect between ferromagnetic αMnAs wires and antiferromagnetic βMnAs wires or possibly due to competing exchange mechanisms in MnAs. Here we present evidence that these domain features are in fact transitions between three-dimensional flux-closure domains of opposite chirality and can therefore rule out the involvement of an antiferromagnetic biasing effect or anisotropic exchange. The formation of the energetically unfavorable V-shaped domain transitions is discussed in the context of the magneto-structural phase transition of the sample.

Original languageEnglish (US)
Pages (from-to)1840-1845
Number of pages6
JournalJournal of Magnetism and Magnetic Materials
Volume323
Issue number14
DOIs
StatePublished - Jul 2011

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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