The Surface Magnetic Current Density node adds a boundary condition for a surface magnetic current density Jms (a flow of magnetic charges along a boundary):

These expressions apply to exterior and interior boundaries, respectively. On exterior boundaries, the condition is equivalent to an Electric field boundary condition where the electric field is specified as Jms × n.

Add a contribution as a Harmonic Perturbation by right-clicking the parent node or click Harmonic Perturbation on the Physics toolbar. For more information see Harmonic Perturbation — Exclusive and Contributing Nodes in the COMSOL Multiphysics Reference Manual.

Enter values or expressions for the Surface magnetic current density Jms, 0 (SI unit V/m) coordinates. The defaults are 0 V/m.