Using Demagnetization Curves

Many permanent magnet manufactures directly provide demagnetization curves for their products, but in most cases, manufactures provide some main parameters, such as residual flux density Br, coercive field force Hc and maximum magnetic energy product (BH)_max, and relative recoil magnetic permeability m_r. This section and the next section describe the basic parameters for the demagnetization curve of permanent magnets and the curve fitting based on these parameters.