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bismuth

thread340-237925

bismuth

bismuth

(OP)
It doesn't make sense to me, but just in case I'll ask. Is there a demagnetization curve for diamagnetic materials such as bismuth? If there is, can someone please provide the curve or data points to graph my own curve?

Thanks,
 
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RE: bismuth

Since Bismuth is diamagnetic, its magnetic susceptibility is negative (-13x10^6 according to Bozorth), so it will have a magnetic permeability (in Gauss-Oersted unit system) less than 1.

I am not aware of anyone measuring a BH curve for the material, but you can probably get a reasonable approximation by using a straight line that goes through the origin and has a slope of .999987

What is the maximum field that you'll be modeling?  The method I described is basically extrapolating, and I wouldn't want to extend it too far.

RE: bismuth

(OP)
I'm actually considering the use of bismuth with N35's in Maxwell SV, and you need to define the material to do anything with it. I'll try the straight line and see what happens, although I'm not sure how I'll test the simulation accuracy before building something.  

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