2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/201925We describe the kink solitary waves of a massive non-linear sigma model with an ${\mathbb S}^2$ sphere as the target manifold. Our solutions form a moduli space of non-relativistic solitary waves in the long wavelength limit of ferromagnetic linear spin chains.4 pages, 5 figuras, revtex4High Energy Physics - Theorytext