  We perform a quantitative, comparative study of the spin pumping, spin
Seebeck and spin Hall magnetoresistance effects, all detected via the inverse
spin Hall effect in a series of over 20 yttrium iron garnet/Pt samples. Our
experimental results fully support present, exclusively spin current-based,
theoretical models using a single set of plausible parameters for spin mixing
conductance, spin Hall angle and spin diffusion length. Our findings establish
the purely spintronic nature of the aforementioned effects and provide a
quantitative description in particular of the spin Seebeck effect.
