Permeability (electromagnetism)

Gyromagnetism

For gyromagnetic media (see Faraday rotation) the magnetic permeability response to an alternating electromagnetic field in the microwave frequency domain is treated as a non-diagonal tensor expressed by::

$\begin{align} \mathbf{B}(\omega) & = \begin{vmatrix} \mu_{1} & -i \mu_{2} & 0\\ i \mu_{2} & \mu_{1} & 0\\ 0 & 0 & \mu_{z}\\ \end{vmatrix} \mathbf{H}(\omega)\\ \end{align}$