EPITAXIAL FERROMAGNETIC MNSB LAYERS ON GAAS SUBSTRATES GROWN BY HOT-WALL EPITAXY

Epitaxial ferromagnetic MnSb layers were grown on GaAs(100), (211)A, a nd (111)A substrates by hot-wall epitaxy. Epitaxial orientation, surfa ce morphology, interfacial structure, and magnetic property of the lay ers were studied. Growth-orientation dependencies of the structural pr operties were also investigated. The c-planes of MnSb are parallel to the GaAs(111) and (111) planes for GaAs(100) substrates, and parallel to the GaAs(111) plane for GaAs(211)A and (111)A substrates. Single-cr ystalline MnSb layers were obtained for GaAs(211)A and (111)A substrat es. Growth of MnSb/GaAs(111)A shows a rather smooth surface and interf ace morphology in comparison with the other growth directions examined . An in-plane anisotropic magnetic property was observed, which depend s on the inclination of the MnSb c-axis from the growth direction.