Electron Spin - Polarization in Photoemission from Thin Al , Gal - , As *
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The surface composition and spin polarization of NiMnSb epitaxial thin films
– The composition in the surface region of the Heusler alloy NiMnSb has been studied using angle-resolved X-ray photoemission spectroscopy, low-energy electron diffraction and spin-polarized inverse photoemission. The results are consistent with a generally Mn-Sb terminal layer, though the surface composition is very sensitive to preparation. The surface composition has a critical influence on ...
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Electron spin polarization in excess of 70% has been observed in photoemission from a 0.1 pm-thick epitaxial layer of In,Gar-,As with ~~0.13 grown on a GaAs substrate. Under these conditions, the epitaxial layer is expected to be highly strained by the 0.9% lattice mismatch. The electron polarization and the quantum efficiency have been measured as a function of the excitation photon energy fro...
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We demonstrate boundary spin polarization at the surface of a Cr2O3 single crystal using spin-polarized low-energy electron microscopy (SPLEEM), complementing prior spin polarized photoemission, spin polarized inverse photoemission, and x-ray magnetic circular dichroism photoemission electron microscopy measurements. This work shows that placing a Cr2O3 single crystal into a single domain state...
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A review of the technique of measuring the spin polarization P of photoemitted electrons and of results of measurements from a variety of magnetic materials is presented. Photoelectric magnetization curves are obtained by measuring P as a function of applied magnetic field, while measuring P as a function of photon energy gives a spectrum of spin polarization which locates magnetic states in an...
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