Abstract
The spin polarization of field-emitted electrons from the (110)-surface of ferromagnetic Ni was observed to be P = (+ 5 ± 2)% (majority spin electrons predominant). This result can be understood qualitatively in the framework of the Stoner-Wohlfarth-Slater model, using hybridized s-d bands. Adsorption of hydrogen (saturation coverage) was found to reduce the spin polarization of electrons emitted along [110] to P (H2) = (+ 1 ± 2)%, suggesting a demagnetization of the (110)-surface of Ni by hydrogen chemisorption.
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