  In this paper we investigate the spin-resolved thermoelectric properties of
strongly correlated molecular junctions in the linear response regime. The
magnetic molecule is modeled by a single orbital level to which the molecular
core spin is attached by an exchange interaction. Using the numerical
renormalization group method we analyze the behavior of the (spin) Seebeck
effect, heat conductance and figure of merit for different model parameters of
the molecule. We show that the thermopower strongly depends on the strength and
type of the exchange interaction as well as the molecule's magnetic anisotropy.
When the molecule is coupled to ferromagnetic leads, the thermoelectric
properties reveal an interplay between the spin-resolved tunneling processes
and intrinsic magnetic properties of the molecule. Moreover, in the case of
finite spin accumulation in the leads, the system exhibits the spin Seebeck
effect. We demonstrate that a considerable spin Seebeck effect can develop when
the molecule exhibits an easy-plane magnetic anisotropy, while the sign of the
spin thermopower depends on the type and magnitude of the molecule's exchange
interaction.

Mesoscale and Nanoscale Physics