Stoner - wohlfarth model

The squareness factor γ, defined as the ratio BHc/iHc, plays very importance role. This factor reflects the magnetization process under a reversed magnetic field in magnet. So the factor γ can be used as the critical parameter for estimating the magnet quality. For the powder compaction of 6.48 g/cm3 mass density, if γ is less than 0.48 then the preparation conditions were far from the optimal ones. The value higher than 0.48 of factor γ proves that in prepared powder the coupling between grains is enhanced.

6p 12120609 01-06-2020 9 0   Download

Incorporation of hysteresis models in electromagnetic analysis approaches is indispensable to accurate field computation in complex magnetic media. Throughout those computations, vector nature and computational efficiency of such models become especially crucial when sophisticated geometries requiring massive sub-region discretization are involved. Recently, an efficient vector Preisach-type hysteresis model constructed from only two scalar models having orthogonally coupled elementary operators has been proposed.

7p kethamoi1 17-11-2019 16 0   Download