Abstract
Epitaxial ferromagnetic MnAs thin films have been grown by molecular-beam epitaxy on semi-insulating InP(001) substrates. The MnAs c axis (MnAs[0001]) lies along the InP[1¯10] axis, and the easy magnetization axis is in-plane, along the MnAs[112¯0] axis, which is parallel to the InP[110] axis. The ferromagnetic transition temperature of the MnAs films on InP(001) was estimated to be 321 K. The structural and magnetic properties of MnAs thin films grown on InP(001) substrates are similar to those of type-A MnAs films grown on GaAs(001) substrates. The feasibility of growing monocrystalline ferromagnetic layers on InP(001) will open up the possibility of monolithic integration of magnetic functions with InP-based optoelectronics devices.
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