The room temperature M-H curve shows ferromagnetic behaviour. I need to fit that M-H curve with the equation 2 given in picture to fin out the ferromagnetic component of the sample.Can anyone please provide the step by step procedure for fitting in origin or excel?
Dear Shalini Kathirkamu,
I am not sure you have to fit the M-H curve with the eq.2. It seems you have to identify those components in your curve (e.g. Hc, Ms, etc) and replace into the equation to calculate the FM component. You have to do it manually once each of these parameters are taken from the different points of the curve behavior.
Cheers.
Origin allows to create a user defined function for fitting. To do that, go to Analysis - Fitting - Nonlinear Curve Fit. In the Setting tab of the fitting window select 'New' from the Category list. The Function Builder will open where you can construct your function step by step. After saving the new function, it will be available in the User Defined category. Try to set reasonable values for the initial parameters, otherwise the fitting might easily diverge in case of the complex non-linear functions.
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