Ampère’s Law, Piezomagnetic
The Ampère’s Law, Piezomagnetic node adds Ampère’s law for the magnetic field in a piezomagnetic material (also called linear magnetostrictive material), and it provides an interface for defining the electric properties. It is normally used as part of the Piezomagnetism multiphysics interface (described in the Structural Mechanics Module User’s Guide) together with a Piezomagnetic Effect multiphysics coupling node and Piezomagnetic Material node in the corresponding Solid Mechanics interface. Ampère’s Law, Piezomagnetic node is added by default to the Magnetic Fields interface when adding a Piezomagnetic Effect multiphysics interface. The interface requires the AC/DC Module and at least one of the following modules: Structural Mechanics, MEMS, Acoustics.
When the Ampère’s Law, Piezomagnetic node is added to the Magnetic Fields interface in the absence of an active Piezomagnetic Effect multiphysics coupling node, the material behaves similarly to an Ampère’s Law node with some limitations. Thus, the magnetic permittivity of free space will be assumed. The piezomagnetic effect is then not included in the corresponding equation system.