SOT Parameter SOT_xi(or EpsilonPrime) for Pt(8nm)/Py(2nm) SHNO in Mumax3

[Parabi Datta]

Dear Mumax3 Community,

I am currently working on simulating a Spin Hall Nano-Oscillator (SHNO) in Mumax3, consisting of a Pt (8 nm) / Py (2 nm).
So far, I have been using spin-transfer torque (STT) to define the oscillations, but now I would like to implement spin–orbit torque (SOT) following the process provided in the Mumax3 tutorial.

For this, I need to specify the value of SOT_xi (or EpsilonPrime), which represents the spin Hall angle–related efficiency parameter. However, we do not know the exact value for our Pt/Py system. What would be your suggestion on which value we should use?

Thanks and Regards,
Parabi Datta