Alnico 8 relative permeability

["sloothrog <salvarsan@xxxxxxx>" <salvarsan@xxxxxxx>]

The FEMM materials library lists A8 relative permeability
as 6.678, or about four times that of Alnico 5: mu == 1.5.

My empirical testing puts the A8 relative permeability close
to 1.3 in the absence of any other ferromagnetic work load.

This is an important consideration in design of variable
reluctance transducers.

Can someone suggest any reference documents for Alnico 8
relative permeability values?

-drh
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