Cross-sectional magnetic force microscopy of MnAs/GaAs(001)

Salles, B. Rache; Marangolo, M.; David, C.; Girard, J. C.
February 2010
Applied Physics Letters;2/1/2010, Vol. 96 Issue 5, p052510
Academic Journal
We investigate the magnetic domain structure and stray field of MnAs/GaAs(001) thin films by magnetic force microscopy of the growth surface and of cleavage edges. The strong uniaxial magnetic anisotropy of MnAs makes the magnetic properties very similar to those of a rectangular bar magnet with constant magnetization along the easy axis direction. By analytical calculations we estimate the out-of-plane magnetic stray field component acting on electrons injected by a MnAs contact into a GaAs-based device.


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