MAGNETIC AND MAGNETOOPTICAL PROPERTIES OF MNPT3 CO MULTILAYER/

Highly ordered MnPt3 alloy film was grown by molecular-beam epitaxy (M BE) at a temperature of 300 degrees C. The MnPt3 film exhibits a large Ken rotation, which reaches a maximum value of -0.7 degrees at 1.24 e V. MnPt3(2 nm)/Co(0.6 nm) multilayers were also grown by MBE method on to MgO(lll) substrates at a temperature of 300 degrees C. It was verif ied by the observation of the reflection high-energy electron diffract ion patterns that Co and MnPt3 layers in the film were grown epitaxial ly on MgO(lll). The appearance of superlattice line due to Cu3Au struc ture in x-ray-diffraction patterns confirmed the formation of the orde red phase in the MnPt3 layer. The hysteresis loops for in-plane and fi lm normal directions became close to each other, which implies that th e perpendicular magnetic anisotropy was induced through the multilayer ed structure. The Ken spectrum of the MnPt3/Co multilayer have a negat ive peak of -0.26 degrees around 1.4 eV. This value is fairly smaller in magnitude compared to the one estimated by the effective reflectivi ty method using the optical and the magneto-optical constants for Co a nd MnPt3 alloy. (C) 1997 American Institute of Physics.