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

摘要

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.