Modelling of a permanent magnet

Hello everyone,

I want to see the magnetic field lines from a bar shaped permanent magnet. I have created a rectangle and surrounded it with the air domain i.e a bigger rectangle. I have the following doubts:-

a) Do I have to create a separate material for the permanent magnet?
b) If yes, What properties do I have to assign to the material?
c) I have selected the Magnetic field (w/o currents) tab in the menu for the simulation. However, I am not able to decide the settins that should be done in this option.

I am very new to COMSOL and hence, I would be grateful to anyone who can be of help.

Thanks,

Pankaj