SQUID data is showing diamagnetic behavior CeO2 NPs ~7 nm size. The sample holder is of Brass. The background data of brass is also available. Now, I want to extrapolate the correct data. May I have to directly subtract the background data from experimental data or there is another method to extrapolate the data.
Hi Mridula Dave ,
I am not able to look at your data. Posting a figure would be helpful. I assume you are measuring a hysteresis loop.
If your material is diamagnetic, it should have a negative slope. Brass, as far as I know is a paramagnet, meaning positive slope. If there are some inclusions or dirt, it may have a very small remanence and you may have to treat the data differently. Otherwise, use least squares to fit a line through your points and simply subtract the holder from the data. Hope this helps,
Mike
measure the slope at higher field (field much higher than coercive field of the sample) and subtract the linear contributions [y=mx+0, in general]. I think, trapped field may shift you obtained data along the field axis.
yes, I want to find out hysterisis loop. Nanoceria shows paramagnetic or ferromagnetic behaviour. Now, by subtracting the sample holder data from nanoceria data, I found a curve of very small loop. By Langvin fittting I want to calculate the paramagnetic contribution. Is this right way?
Please, tell me the correct formula for fitting?
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