I have characterised magnetic materials with VSM. and determined SQR & K values. Is it possible to determine those values when materials not attained saturation from the M-H loop.? In the below-attached graph, only blue line alone attained saturation from my view. Is that so?
Hello Mathu. It seems to me that the blue line indicates that the sample includes paramagnetic and ferromagnetic behaviors, while the other two only exhibit paramagnetism.
You need to apply a fitting model and so find your parameters but not directly from the curve. OriginLab software afford such feature.
Mathu Sridharpanday - I agree with Eric Hermanny - in case of mixed systems (para+ferro, ferro+ dia etc) it helps to measure out to higher fields making sure that the loops close and the high field regions allow to subtract the non-hystoretic contribution... Hope that helps, good luck!
The paramagnetic behavior (M x H) is linear and it is not complicated to subtract it from the measured curve, in order to get the magnetization curve corresponding to the ferromagnetism of the sample. I have done this after measuring (not with VSM but with AGFM - Alternating Gradient Force Magnetometer) a ferromagnetic thin film (YIG) on a paramagnetic substrate (GGG)
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