2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/16391The orbital and spin moment of the Ni2+ ion in NiO has been calculated within the quasi-atomic approach. The orbital moment of 0.54 mB amounts at 0 K, in the magnetically-ordered state, to more than 20% of the total moment (2.53 mB). For this outcome, being in nice agreement with the recent experimental finding taking into account the spin-orbit coupling is indispensable.4 pages in RevTex, 1 figure in EPS styleStrongly Correlated Electronstext