J. Khalifeh, MAGNETIC-STRUCTURE OF VANADIUM OVERLAYERS ON SEMIINFINITE NB SUBSTRATE, Journal of magnetism and magnetic materials, 168(1-2), 1997, pp. 25-30
We investigate the magnetic ordering of V/Nb systems using a real spac
e tight-binding approach. The magnetism is described in the unrestrict
ed Hartree-Fock approximation of the Hubbard Hamiltonian. The density
of states has been calculated within the recursion technique. The magn
etic moments of V-n/Nb system with n = 1-3 for different crystallograp
hic directions {(0 0 1), (0 1 1), (1 1 1)} have been calculated. The o
nset of magnetism depends strongly on the faces considered. Magnetism
is more pronounced for the (0 0 1) surface and is found to decrease wh
en V is allowed to relax in order to recover its bulk volume. The magn
etic moments of the surface layers are strongly enhanced by addition o
f more V layers. A sizable induced moment appears in the Nb interface
layer which decreases by addition of more V layers.