Permeability Tensor of Ferrite

The permeability tensor of ferrite is treated as follows. The permeability can be obtained from the equations below.

Assuming that the static magnetic field is H0 in the z direction, the permeability is represented by the equations below.

q: charge of an electron, me: mass of an electron, g: g factor,

ΔH: gyromagnetic resonance linewidth, Ms: saturation magnetization

[References]

David M. Pozar, "Microwave Engineering"