  We investigate thermoelectric properties of a ferromagnet-superconductor
hybrid structure with Rashba spin-orbit interaction and delta function
potential barrier at the interfacial layer. The exponential rise of thermal
conductance with temperature manifests a cross-over temperature scale
separating two opposite behaviors of it with the change of polarization in the
ferromagnet whereas the inclusion of interfacial Rashba spin-orbit field
results in a non-monotonic behavior of it with the strength of Rashba field. We
employ scattering matrix approach to determine the amplitudes of all the
scattering processes possible at the interface to explain the thermoelectric
properties of the device. We examine Seebeck effect and show that higher
thermopower can be achieved when the polarization of the ferromagnet tends
towards the half-metallic limit. It can be enhanced even for lower polarization
in presence of the finite potential barrier. In presence of interfacial Rashba
spin-orbit interaction, Seebeck coefficient rises with the increase of barrier
strength and polarization at weak or moderate interfacial Rashba field. From
the application perspective, we compute the figure of merit and show that
$zT\sim 4-5$ with higher polarization of the ferromagnet both in absence and
presence of weak or moderate Rashba spin-orbit interaction along with the
scalar potential barrier.
