COMPARISON OF THE SPIN POLARIZATION OF THE PHOTOELECTRON DIFFRACTION SPECTRA FOR DIFFERENT STRUCTURE MODELS OF MAGNETITE(111) LAYERS

Layers of magnetite structure were observed in deposing iron oxide on Pd by LEED measurements. We consider the magnetic structure of these l ayers. It is investigated whether spin-polarized and angle-resolved ph otoelectron diffraction can be used to distinguish between the Zuo and the Mizoguchi model, respectively. In the two models we have a differ ent distribution of the Fe2+ and Fe3+ ions. This difference is incorpo rated into the calculation by spin-dependent scattering phase shifts. The results of the calculation show that there is a cancellation of th e magnetic scattering in the Mizoguchi structure whereas there remains a contribution in the Zuo model. Thus, we conclude that these structu res should be distinguishable by spin-polarized angle-resolved photoel ectron diffraction.