  It has been suggested by theoretical works that equal spin-triplet Cooper
pairs can be generated in Josephson junctions containing both a ferromagnet and
a source of spin-orbit coupling. Our recent experimental work suggested that
spin-triplet Cooper pairs were not generated by a Pt spin-orbit coupling layer
when the ferromagnetic weak link had entirely in-plane anisotropy (N. Satchell
and N.O. Birge, Phys. Rev. B 97, 214509 (2018)). Here, we revisit the
experiment using Pt again as a source for spin-orbit coupling and a [Co(0.4
nm)/Ni(0.4 nm)]$_{\times8}$/Co(0.4 nm) ferromagnetic weak link with both
in-plane and out-of-plane magnetization components (canted magnetization). The
canted magnetization more closely matches theoretical predictions than our
previous experimental work. Our results suggest that there is no supercurrent
contribution in our junctions from equal spin-triplets. In addition, this work
includes the first systematic study of supercurrent dependence on Cu interlayer
thickness, a common additional layer used to buffer the growth of the
ferromagnet and which for Co may significantly improve the growth morphology.
We report that the supercurrent in the [Co(0.4 nm)/Ni(0.4
nm)]$_{\times8}$/Co(0.4 nm) ferromagnetic weak links can be enhanced by over
two orders of magnitude by tuning the Cu interlayer thickness. This result has
important application in superconducting spintronics, where large critical
currents are desirable for devices.
