EPITAXIAL FERROMAGNETIC MNGA NIGA MULTILAYERS ON GAAS/

We have created a new class of epitaxial magnetic multilayers consisti ng of ultrathin monocrystalline layers of two different metallic compo unds, MnGa and NiGa, on GaAs substrates. In-situ RHEED and ex-situ TEM characterizations show that the MnGa/NiGa multilayers are formed with the desired epitaxial orientations. Magnetization and magnetotranspor t measurements indicate perpendicular magnetization at room temperatur e, thus making this material a promising candidate for nonvolatile mag netic memory coupled with underlying III-V circuitry.