SPIN-DEPENDENT QUANTUM SIZE EFFECTS IN THE ELECTRON REFLECTIVITY OF ULTRATHIN FERROMAGNETIC CRYSTALS

R. Zdyb and E. Bauer
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R. Zdyb: Department of Physics and Astronomy, Arizona State University, Tempe, AZ 85287-1504, USA;
E. Bauer: Department of Physics and Astronomy, Arizona State University, Tempe, AZ 85287-1504, USA

Surface Review and Letters (SRL), 2002, vol. 09, issue 03n04, 1485-1491

Abstract: We have studied the spin-dependent quantum size effects in the reflection of 0–20 eV electrons from 2–10-ML-thick Fe microcrystals grownin situon a W(110) surface in a spin-polarized low energy electron microscope. The goal is to obtain a better understanding of the magnetic ("asymmetry") image contrast and of the limits of spin polarization devices based on the quantum size contrast. The contrast is interpreted in terms of the band structure and of the spin-dependent inelastic mean free path. For the figure of merit of spin polarization devices, an upper limit of 5 × 10-2is obtained.

Date: 2002
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DOI: 10.1142/S0218625X02003925

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