Calculating H Fields from Magnetization: mag2hfield

The mag2hfield utility takes a micromagnetic problem specification file (.mif) and a magnetization file (.omf) and uses the mmSolve2D computation engine to generate files for the resulting component (magnetostatic, exchange, crystalline anisotropy) and total H fields. The main use of this utility to study the fields in a simulation using magnetization files generated by an earlier mmSolve2D run.

Launching
The mag2hfield launch command is:

tclsh oommf.tcl mag2hfield [standard options] [-fieldstep #] \
   [-component [all,][anis,][applied,][demag,][exchange,][total]] \
   mif_file omf_file

where

-component [all,][anis,][applied,][demag,][exchange,][total]

Specify all field components that are desired. Optional; default is total, which is the sum of the crystalline anisotropy, applied, demagnetization (self-magnetostatic) and exchange fields.

-fieldstep #

Applied field step index, following the schedule specified in the input MIF file (0 denotes the initial field). Optional; default is 0.

mif_file

MIF micromagnetic problem specification file (.mif). Required.

omf_file

Magnetization state file. This can be in any of the formats accepted by the avfFile record of the input MIF file. Required.

The H field output file format is determined by the Total Field Output Format record of the input MIF file. The output file names have the form basename-hanis.ohf, basename-happlied.ohf, etc., where basename is the input .omf magnetization file name, stripped of any trailing .omf or .ovf extension.

OOMMF Documentation Team
January 15, 2004