  We present a method to quantify the spin Hall angle (SHA) with spin pumping
and microwave photoresistance measurements. With this method, we separate the
inverse spin Hall effect (ISHE) from other unwanted effects for permalloy/Pt
bilayers using out-of-plane microwave excitation. Through microwave
photoresistance measurements, the in- and out-of-plane precessing angles of the
magnetization are determined and enabled for the exact determination of the
injected pure spin current. This method is demonstrated with an almost perfect
Lorentz line-shape for the obtained ISHE signal and the frequency independent
SHA value as predicted by theory. By varying the Pt thickness, the SHA and
spin-diffusion length of Pt is quantified as 0.012 (0.001) and 8.3 (0.9) nm,
respectively.
