  We study the local and non-local magnetoresistance of thin Pt strips
deposited onto yttrium iron garnet. The local magnetoresistive response,
inferred from the voltage drop measured along one given Pt strip upon
current-biasing it, shows the characteristic magnetization orientation
dependence of the spin Hall magnetoresistance. We simultaneously also record
the non-local voltage appearing along a second, electrically isolated, Pt
strip, separated from the current carrying one by a gap of a few 100 nm. The
corresponding non-local magnetoresistance exhibits the symmetry expected for a
magnon spin accumulation-driven process, confirming the results recently put
forward by Cornelissen et al. [1]. Our magnetotransport data, taken at a series
of different temperatures as a function of magnetic field orientation, rotating
the externally applied field in three mutually orthogonal planes, show that the
mechanisms behind the spin Hall and the non-local magnetoresistance are
qualitatively different. In particular, the non-local magnetoresistance
vanishes at liquid Helium temperatures, while the spin Hall magnetoresistance
prevails.
