Hiiiiii Alffnot,
I'm sorry if you are little more elaborate as to what you are trying to achieve using the magnetic material it would be appropriate, or atleast what is the aim of the paper you are trying to simulate, because, as far as my knowledge goes, you can pretty well define your magnetic material as anisotropic when defining your material for the substrate (as an example), here suppose if you are using something like ferrite then you can set its magnetic saturation as 10Oe and can change the magnetic bias from 1T to any other amount you want, I hope this satisfies your query
Bye.....