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 language | English (US) |
|---|---|
| Pages (from-to) | 1763-1766 |
| Number of pages | 4 |
| Journal | Physica Status Solidi (C) Current Topics in Solid State Physics |
| Volume | 4 |
| Issue number | 5 |
| DOIs | |
| State | Published - 2007 |
| Event | 33rd International Symposium on Compound Semiconductors, ISCS-2006 - Vancouver, BC, Canada Duration: Aug 13 2006 → Aug 17 2006 |
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics