Hello everyone.
I noticed that the magnetization curves of materials are sometimes given with an MH curve, and sometimes with a BH curve. I can switch from a MH curve to a BH curve with B=u0(H+M) in SI or B=H+4piM in cgs.
Why for some materials (like metals or ferrofluids), the magnetization curve is often given as a BH curve, whereas for particles, a MH curve is generally given ? For the same reason, saturation values are often given in Tesla for metals but in emu/g for magnetic particles.
If I don't have a curve, but only the magnetization value at saturation in Gauss or Tesla of a material, how can I switch to emu/g or Am2/kg for particles made of this material ?
Thank you a lot for your help
Simon
Hi,
I think if am understanding your question properly. Then the conversion of unit is applicable, remember the fact that energy proportional to product of order parameter and the driving parameter. E ~~ MH, gives emu = 0.001 Joule per Tesla.
The reason for using different units is most likely the measurement method. In Epstein frame you measure B, while VSM device gives you M.
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