MAGNETISM OF VICINAL SURFACES OF VANADIUM

Hubbard tight-binding Hamiltonian is used to derive the local magnetic moments of low-index and vicinal V surfaces. The polarization of the low-index surface atoms can be qualitatively explained through the coo rdination number rule but inwards relaxation tends to suppress it. For vicinal surfaces, both the single-cell and double-cell magnetic perio dicities are considered. The magnetic moments at the edge of the step are much lower than on their neighbouring atoms in the plane of the st ep and to atoms of the less coordinated crystallographic faces (100) a nd (111).