2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/21336It is shown that there is bi-stability in a two dimensional system consisting of non interacting magnetic nanoparticles with equal uniaxial anisotropies. It is also shown that bi-stability still remains in three dimensions. The only consideration is that the applied magnetic field has to be perpendicular to the anisotropy axis.3 pages, 1 figureStatistical Mechanicstext