SPIN-RESOLVED AND ANGLE-RESOLVED PHOTOELECTRON-SPECTROSCOPY FROM FERROMAGNETIC NI(110), NI(110)-P(2X1)O AND NI(110)-C(2X2)S

Spin-dependent electronic structures of Ni(110), Ni(110)-p(2 x 1)O and Ni(110)-c(2 x 2)S were studied by spin-and angle-resolved photoelectr on spectroscopy along the <(Gamma)over bar>(S) over bar line of Ni(110 ) surface Brillouin zone. At a binding energy of about 1.3 eV a signif icant photoelectron peak is observed near to the S point of the surfac e Brillouin zone showing up an electron spin polarization of about -9 +/- 1%, i.e. in this peak minority spin electrons are preferred. The d egree of this spin polarization is found to be reduced upon O and S ad sorption. The measured data are discussed in comparison with band-stru cture calculations. (C) 1998 Elsevier Science B.V.