Surface spin-wave in monocrystalline, epitaxial layers of manganese ferrite

We observed two surface spin-wave modes in ferromagnetic resonance in monocrystalline, epitaxial layers of manganese ferrite. The layers,2-3\mum thick, were obtained by CVD on monocrystalline MgO substrates. In MEFL, observations were performed at room temperature and a frequency of 26,6 GHz. The critical angles for which the surface modes vanish amount to 48° and 37° respectively, for line I and line II. The magnetic parameters for uniform mode are:4\piM_{eff}= 280Gs, HA= -290 Oe, andg = 2,00.