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Permanent magnets are assigned by choosing a permanent magnet material for a solid. These materials are defined by the Magnetization Direction vector, and a demagnetization curve. The Magnetization Direction vector direction indicates the direction of the magnetization relative to the global world coordinate system. The magnitude of the vector is ignored. The demagnetization curve is defined using comma-delimited lists: one for the magnetic induction (parameter labeled Demagnetization Curve B (T)) and the other for the corresponding magnetic field (parameter labeled Demagnetization Curve H (A/m) ). At a minimum, two points should be specified: for B the two points are Br and zero, in that order, where Br is the residual induction or remanence, and for H the two points are zero and Hc, where Hc is the coercive force. The image below shows this simplest case, where B and H are each defined with two points. A more detailed curve can be specified by adding more points to these lists.

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