Demag Type: Specify algorithm and demagnetization kernel
used to calculate self-magnetostatic
(demagnetization) field. Must be one of
- ConstMag: Calculates the average field in
each cell under the assumption that the magnetization is
constant in each cell, using formulae from
[2,25,11].
(The other demag options calculate the field at the center
of each cell.)
- 3dSlab: Calculate the in-plane field components
using offset blocks of constant (volume) charge. Details
are given in [3]. Field components parallel to
the
-axis are calculated using squares of constant
(surface) charge on the upper and lower surfaces of the
sample.
- 3dCharge: Calculate the in-plane field component
using rectangles of constant (surface) charge on each cell.
This is equivalent to assuming constant magnetization in
each cell. The -components of the field are calculated
in the same manner as for the 3dSlab approach.
- FastPipe: Algorithm suitable for simulations that
have infinite extent in the -direction. This is a 2D
version of the 3dSlab algorithm.
- None: No demagnetization. Fastest but least
accurate method.
:-}
All of these algorithms except FastPipe and None require that the
Part Thickness (cf. the Part Geometry
section) be set. Fast Fourier Transform (FFT) techniques
are used to accelerate the calculations.
