>the slope of the curve cannot be less than that of free space
For "Intrinsic" it can be.

O.k. That's why once and once again I point it out is that calling the curve BH in "intrinsic" mode is unphysical. It is not BH, but MH (you can call it JH, but you have already reserved M_s for saturation magnetization, and J for current density, so it is MH, or 4¤ÇMH after all). Bi is a special term used by technologists in measurements, where you can not be sure about the actual M. so yes, they measure some kind of Bi... But Ansys EDT is a simulation suit, there is no place for notation used in measurements.