I have done vsm measurements at different temperatures. I fitted my data using the empirical formula to obtain average Ms(0) at different temperatures. Specifically my question is do I just solve the empirical formula to get M(T)?? Is this the correct way of doing this calculation??

Empirical formula: M(H)= Ms(0) (1-a/H - b/H^2 - ....) + xH

I'm assuming M(H) = M(T) and from the fit I am able to get all the variables on the right i.e a, b, chi (x)