|Type:||2-Tensor, or section|
|Range:||[v_1, …, v_9]|
|Default:||[1.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 1.0]|
This parameter specifies the relative electric permeability (the coupling between magnetic flux field and the electric field ) as follows:
Usually the relative electric permeability is defined relative to the background permittivity and permeability. We do not follow this convention as it is not clear how this convention is applied for general an-isotropic tensors and .
The relative electric permeability is typically linked to the magnetic permittivity . See there for detailed discussion of bi-anistropic materials.