Micromagnetic properties of epitaxial MnAs films on GaAs surfaces

Thorsten Hesjedal, Roman Engel-Herbert, Daniel M. Schaadt, Klaus H. Ploog

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations

Abstract

We present a systematic study of the micromagnetic properties of MnAs deposited by molecular-beam epitaxy on GaAs(001) and GaAs(111)B surfaces. In epitaxial MnAs films, the strain state in MnAs-on-GaAs(001) (anisotropic) and MnAs-on-GaAs(111)B (isotropic) has a strong influence on the magneto-structural phase transition and thus the micromagnetic properties. The ferromagnetic α and the β phase coexist over a wide temperature range exhibiting self-organized, magnetically coupled nanostructures. Independent of the substrate orientation, magnetic flux-closure domain patterns are formed in the basal plane of MnAs. The spatial distribution of the phases in equilibrium (stripes and quasi-hexagonal islands, respectively) stabilizes various magnetic states, which were found experimentally and confirmed by micromagnetic simulations.

Original languageEnglish (US)
Pages (from-to)1763-1766
Number of pages4
JournalPhysica Status Solidi (C) Current Topics in Solid State Physics
Volume4
Issue number5
DOIs
StatePublished - Dec 1 2007
Event33rd International Symposium on Compound Semiconductors, ISCS-2006 - Vancouver, BC, Canada
Duration: Aug 13 2006Aug 17 2006

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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