The optional control point specs
determine the conditions that cause the applied field to be
stepped, or more precisely, end the simulation of the
magnetization evolution for the current applied field. The
control point specs are specified as -type value pairs.
There are 3 recognized control point types:
-torque,
-time, and
-iteration. If a -torque pair
is given, then the simulation at the current applied field is
ended when
(i.e.,
) at all spins in the simulation is
smaller than the specified -torque value (dimensionless). If a
-time pair is given, then the simulation at the current field is
ended when the elapsed simulation time for the current field
step reaches the specified -time value (in seconds). Similarly,
an -iteration pair steps the applied field when the iteration
count for the current field step reaches the -iteration value.
If multiple control point specs are given, then the applied field
is advanced when any one of the specs is met. If no control point
specs are given on a range line, then the Default Control
Point Spec is used.
For example, consider the following Field Range line:
Field Range: 0 0 0 .05 0 0 5 -torque 1e-5 -time 1e-9This specifies 6 applied field values, (0,0,0), (0.01,0,0), (0.02,0,0), ..., (0.05,0,0) (in Tesla), with the advancement from one to the next occurring whenever
The Field Range record is optional, with a default value of 0 0 0 0 0 0 0.