I need a magnetic moment value (~ 1.75 for my sample). How can i get it from this plot
please do the needful
Your VSM graph shows paramagnetic behaviour, and what do you want i don't get it,
If you want saturation magnetization of your sample or something else so clear your question first
"How to get magnetic moment value from the VSM plot" Is it magnetic saturation? Than as Dr Vinay said that is no saturation because ur sample is paramagnatic.
Cooldown the sample below it's TC and re-meassure.
I need to know the magnitude of magnetic moment in terms of BM. So, from the graph, could I calculate the value?
U need to to change the Y-axis to B so u can use LAS (law to approach saturation) to get the Ms. Also u can get the Ha, K and BHmax.
First, strictly speaking, Your graph actually represents the magnetic moment of the sample at different values of magnetic field intensity. For the calculation of the magnetization You must divide this value by the volume, and for calculation of the specific magnetization divide by mass of the sample.
Second, in what units is specified the (desired?) magnetic moment of Your sample? This refers to the saturation? If the magnetic moment (1.75) is specified in the e.m.u., You is still not reached to this value. Perhaps, indeed, the Curie temperature of the sample is maintained at a lower temperature. The Hc value is large too.
It is also possible that You have not obtained the necessary (estimated) composition of Your sample.
Third, what behavior has magnetization curve for H>15000 G?
You give scarce and heterogeneous information. You have carried out the magnetic moment measurements for 3 g of substance. But 1.75 mB is unlikely to relate to such its quantity.
You need to specify what is this magnetic moment: per atom, molecule, formula unit or, maybe, per elementary cell of Your substance? By the way, You didn't specify what substance do You investigate.
my material is polystyrene divinyl benzene bound transition metal complex. In order to know the magnetic moment of the metal, I got vsm done. But now unable to predict
A number of points need to be addressed here.
Firstly, you can extract any value of the magnetic moment that you want. You could, for example, choose a moment of zero, or -100 µemu, but what is the significance of those?? Typically, when we look at hysteresis moment data we are interested in the saturation moment or the remanent moment after saturation, but there are other quantities too. What are you interested in??
Second, you sample is not saturated, which makes calculating saturation moment or the remanent moment after saturation tricky. It is possible to do with approach to saturation techniques, but this is a non-unique problem, which the uncertainties large.
Third, although some have suggested it, you sample in not purely paramagnetic. This is evidenced by the non-zero coercivity. Your sample most probably has a contribution from paramagnetic and/or diamagnetic materials of the holder etc, but there is a clear coercivity, which indicates ferro-/ferrimagnetic behavior. The fact that you have not reached saturation gives the hysteresis loop the appearance of straight lines.
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