2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/28306In the past different models for the magnetic salt vanadyl pyrophosphate (VOPO) were discussed. Neither a spin ladder nor an alternating chain are capable to describe recently measured magnetic excitations. In this paper we propose a 2D model that fits better to experimental observations.4 pages, 6 figures includedStrongly Correlated Electronstext