  e report measurements of long ranged supercurrents through ferromagnetic and
fully spin-polarized CrO$_2$ deposited on TiO$_2$ substrates. In earlier work,
we found supercurrents in films grown on sapphire but not on TiO$_2$. Here we
employed a special contact arrangement, consisting of a Ni/Cu sandwich between
the film and the superconducting amorphous Mo$_{70}$Ge$_{30}$ electrodes. The
distance between the contacts was almost a micrometer, and we find the critical
current density to be significantly higher than found in the films deposited on
sapphire. We argue this is due to spin mixing in the Ni/Cu/CrO$_2$ layer
structure, which is helpful in the generation of the odd-frequency spin triplet
correlations needed to carry the supercurrent.
