Extended Data Figure 5.

Spin-Hall Magnetoresistances for a geometry with platinum wires along the y axis (spin-accumulation μ_x along x) a, For a magnetic field H parallel (grey dots) to the wire. The jump in resistance around 8-10 T for H parallel to the wire correspond to the DMI induced spin-flop field (see Methods 3). b, For a magnetic field H perpendicular to the wires (black dots). The jump in resistance at 6T correspond to the more classical spin-flop field. (The solid lines correspond to a combined regression fit of the H-along-x and H-along-y data of the spin mixing conductances from Extended Data Eqs. 3, 4 and 5, yielding $g_n^{(\uparrow \downarrow )}$ = 31.77 /nm² and $g_{im}^{(\uparrow \downarrow )}$ = 136.52 /nm². The two field directions are fitted together with $g_{im}^{(\uparrow \downarrow )}$ = 0, and K/J = 0.025 and D/J = 0.011, using λ = 2 nm, θ_SH = 0.1 and ρ₀= 40 μΩ.cm for the normal metal wires)