PDE Toolbox solution to magnetic field of a permanent magnet

I am a newcommer to the PDE toolbox. I am trying to setup a ring shaped permananet magnet and solve for its B field everywhere.

The data available for the magnet are the remenence field (Br), the B vs H data, and coercivity. I have a pretty good knowledge of PDEs and know how to solve them analytically in simple cases. I have not been able to fnd a simple exmple of how to setup and run the PDE toolbox for a permananet magnet in the absence of any free currents or externally applied fields for a uniformly magnetized PM.

Not knowing which potential the PDE Toolbox's Magnetostatic solves for (e.g., Vector potential using bound surface currents or scaler potential using surface "charges") adds to my uncertainty.

Could anyone direct me to such and example or provide some guidence on how to setup the problem.