  Coating two nearby bodies with thin ferromagnetic films one obtains, below
the Curie temperature, two interacting sets of magnetic domains. The dynamical
properties of the bodies in presence of this domain interaction have never been
investigated so far. In this work I derive a set of equations to simultaneously
describe both the domain evolution within the two films and the dynamics of the
coated bodies. The shape, size and mobility of the domains can be easily
controlled with an external magnetic field or properly choosing the material
properties, thus unravelling how the domain characteristics influence the
system dynamics. This can be thus of great technological relevance, providing
new means to control and actuate mechanical motion at the micro- and
nano-scale.
