The BH nonlinear permanent magnet constitutive relation available in the Magnetic Fields and Magnetic Fields, No Currents is intended for easy modeling of self-demagnetization of soft permanent magnets, for example AlNiCo. It uses a nonlinear BH-relation that is isotropic around a point in H space that is shifted by the coercive field Hc. The shifted BH and HB curves that are specified in the associated material node are thus supplied in the first quadrant, that is shifted by Hc with respect to the uniaxial curve. The AC/DC database in the Add Material window contains an example material, Nonlinear Permanent Magnet to be used with this constitutive relation. It is a generic/approximate representation of AlNiCo 5.