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Abstract

In LEED from the (111) surface of platinum the dependence of the spin polarization on the planar angle theta' and the azimuthal angle phi in the energy range from E=60eV to E=70eV was investigated. Our results further confirm earlier findings concerning the symmetry properties of the polarization vector P.An appropriate rotation diagram clearly demonstrates that by means of momentum averaging the strong influence of multiple scattering on spin polarization cannot be eliminated. By systematic analysis of P(E,theta'phi) data it is shown that there are strong polarization features which are coupled to a fixed direction of the crystal. Spin up/spin down partial intensities evaluated from simultaneously measured spin polarization and total intensity data show quite different behaviour. Therefore, if spin dependent scattering is strong, the total intensity cannot be calculated correctly within a theory, which handles the multiple scattering spin independent.

Additional information

Authors: BAUER P UNIVERSITAET LINZ (AUSTRIA) ECKSTEIN W MAX-PLANCK-INSTITUT FUER PLASMAPHYSIK, GARCHING BEI MUENCHEN (GERMANY) MUELLER N UNIVERSITAET OSNABRUECK (GERMANY) , UNIVERSITAET LINZ (AUSTRIA);MAX-PLANCK-INSTITUT FUER PLASMAPHYSIK, GARCHING BEI MUENCHEN (GERMANY);UNIVERSITAET OSNABRUECK (GERMANY)
Bibliographic Reference: ZEITSCHRIFT FUER PHYSIK - CONDENSED MATTER, VOL. 52 (1983), NO. 185-192
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