Nonlinear vs. Linear Permanent Magnets

In general, permanent magnets are nonlinear and should be modeled via a B-H curve as shown below. The magnetic coercivity, H_c, is defined as the B-H curve's H-axis intercept, and the magnetic remanence, B_r, as its B-axis intercept.

In many applications, however, the permanent magnet's behavior can be approximated using a linear relationship between B and H. In these cases, there is no need to create a nonlinear material. Enter the appropriate values of B_r or H_c for the material when defining its properties.