Self-Demagnetization of a Cylindrical AlNiCo Magnet

Application ID: 57891

Soft permanent magnets like AlNiCo are easily demagnetized if handled incorrectly. This is a demonstration of how to model the self-demagnetization of a cylindrical AlNiCo magnet when moved out of its associated/protective magnetic circuit. The modeling is performed in three steps:

  1. The soft magnet protected by the magnetic circuit.
  2. The self-demagnetization of the soft magnet when moved into free air.
  3. The linear recoil model when moved back into the magnetic circuit.

This model example illustrates applications of this type that would nominally be built using the following products: