Since version 2026, Flux 3D and Flux PEEC are no longer available.

Please use SimLab to create a new 3D project or to import an existing Flux 3D project.

Please use SimLab to create a new PEEC project (not possible to import an existing Flux PEEC project).

/!\ Documentation updates are in progress – some mentions of 3D may still appear.

List of models for soft magnetic materials

Models for soft magnetic materials

The various models available for the description of soft magnetic materials are given in the following table.

Isotropic/anisotropic material: linear approximation
Linear isotropic B = μ.H Linear anisotropic
Linear isotropic complex Linear anisotropic complex
Isotropic /anisotropic material: nonlinear approximation
Isotropic saturation: B = μ(H).H
  • analytic
  • analytic + knee adjustment
  • spline
 Anisotropic saturation * :
  • analytic *
  • analytic + knee adjustment *
  • spline *

Parabola isotropic + straight line:

B = μ(H).H
Isotropic material: hysteresis **
Preisach model
  • described by 4 parameters of a typical cycle
  • identified by N triplets
Jiles-Atherton model
Note: * Currently, the usage of these models must respect the following conditions:
  • available in Magneto Static and Transient Magnetic applications only, in 2D plane domains
  • assigned to magnetic non conducting or solid conductor regions
Note: ** Hysteresis models are available in Transient Magnetic (2D, 3D) applications only

Other specific models are also provided (see table below). Their usage mode is presented in § Spatial model / user model.

Magnetic property …
… spatial linear isotropic or anisotropic: μr described via spatial formula(e)
… user-defined: μr described via user subroutine and personal version