  We study thermal and charge transport in a three-terminal setup consisting of
one superconducting and two ferromagnetic contacts. We predict that the
simultaneous presence of spin filtering and of spin- dependent scattering phase
shifts at each of the two interfaces will lead to very large nonlocal thermo-
electric effects both in clean and in disordered systems. The symmetries of
thermal and electric transport coefficients are related to fundamental
thermodynamic principles by the Onsager reciprocity. Our results show that a
nonlocal version of the Onsager relations for thermoelectric currents holds in
a three-terminal quantum coherent ferromagnet-superconductor heterostructure
including a spin-dependent crossed Andreev reflection and coherent electron
transfer processes.
