© 2002 IEEE. Epitaxial MnAs films on GaAs are of interest as ferromagnetic layers suitable for spin injection into semiconductors. Recent studies revealed that the phase transition near room temperature from the paramagnetic orthorhombic β phase above 40°C to the ferromagnetic hexagonal α phase below 40°C is of crucial importance for the structural and magnetic properties of the films. In this paper we report about ordered structures of the coexisting phases as a result of epitaxial strain and demonstrate the strong coupling between the magnetic order and the two-phase system.
Materials by design for sustainable solutions in the energy, medical, transport, and engineering sectors
