2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/158889Ab-initio quantum transport calculations show that short NiO chains suspended in Ni nanocontacts present a very strong spin-polarization of the conductance. The generalized gradient approximation we use here predicts a similiar polarization of the conductance as the one previously computed with non-local exchange, confirming the robustness of the result. Their use as nanoscopic spinvalves is proposed.2 pages, 1 figure; accepted in JMMM (Proceedings of ICM'06, Kyoto)Materials ScienceMesoscale and Nanoscale Physicstext