Relative Permeability for a Maxwell or RMxprt Material

For relative permeability, select one of the following and specify the units:

1. For the Nonlinear type, you can define one of the following three B-H curves via the B-H Curve button: a normal B-H curve, a demagnetization curve, or a hysteresis curve; see Specifying BH Curves for Nonlinear Relative Permeability for more details.
2. For the Anisotropic type, you can select a Simple or Nonlinear type for each principal direction. For a Nonlinear type, you can define a normal B-H curve or a hysteresis curve, but not a demagnetization curve, via B-H Curve button; see Specifying BH Curves for Nonlinear Relative Permeability for more details.
3. The Magnetic Coercivity is a vector type that includes a Magnitude field and three Unit Vector component fields.
• For the Simple or linear Anisotropic Relative Permeability type (select Simple type for all three principal directions), the Magnitude field is enabled for input to specify a permanent magnet coercivity. A non-zero Magnitude value will enable the X, Y, and Z Unit Vector component fields to specify the permanent magnet's magnetization direction.
• For the Nonlinear Relative Permeability type, the Magnitude field is non-editable; it displays the magnetic coercivity value of the input BH curve, and X, Y, and Z Unit Vector component fields are enabled. If the input BH curve is a normal BH curve (zero value for Magnitude field), it is not necessary to specify Unit Vector components. If the input BH curve is a demagnetization curve (non-zero value for Magnitude field), a non-zero Unit Vector component is required to specify the permanent magnet's magnetization direction.
• For the nonlinear Anisotropic Relative Permeability type (select at least one Nonlinear type for three principal directions), the Magnitude field is non-editable; it displays the maximum magnetic coercivity value of the input BH curves, and the X, Y, and Z Unit Vector component fields are enabled. If the input BH curves are normal BH curves (zero value for Magnitude field), it is not necessary to specify Unit Vector components.
• For the Nonlinear or nonlinear Anisotropic Relative Permeability type defined with a hysteresis BH curve (non-zero value for Magnitude field), a non-zero Unit Vector can be used to specify the initial magnetization direction, and the successive magnetic field will start from (0, Br) in the initial magnetization direction. In this way, the anisotropic hysteresis model can be used to model an anisotropic permanent magnet without completing the magnetization process. A zero Unit Vector means the successive magnetic field will start from (0, 0).