  Curvature of nanomagnets can be used to induce chiral textures in the
magnetization field. Here we perform analytical calculations and micromagnetic
simulations aiming to analyze the stability of in-surface magnetization
configurations in toroidal nanomagnets. We have obtained that despite toroidal
vortex-like configurations are highly stable in magnetic nanotori, the
interplay between geometry and magnetic properties promotes the competition
between effective interactions yielding the development of a core in a vortex
state when the aspect ratio between internal and external radii of nanoturus is
$\gtrsim0.75$.
