Ms=SI(0.86e6, 'A/m'),
exchange_coupling=SI(13.0e-12, 'J/m'))
s = FDSimulation(do_demag=True)
s.set_params(stopping_dm_dt=20*degrees_per_ns)
nm = SI(1e-9, "m")
def rectangle(pos):
# if (pos[0] >=10e-9 and pos[0] <= 20e-9 and
# pos[1] >=10e-9 and pos[1] <= 20e-9):
return 'magnetic'
# else:
# return None
s.create_mesh([5, 5, 1], [5.0*nm, 5.0*nm, 3.0*nm], mat_Py,regions=rectangle)
s.set_m([1, 1, 1])
Hs = nmag.vector_set(direction=[1.0, 1.0, 1.0],
norm_list=[1.00, 0.95, [], 0.1, 0.09, [],
-0.1, -0.15, [], -1.00],
units=1e6*SI('A/m'))
s.hysteresis(Hs, save=[('field_m', at('time', SI(0, 's')) | at('convergence'))])
# Process the results
NCOL=os.path.join(os.path.dirname(os.path.abspath(nmag.__file__)), "../../bin/ncol")
os.system(NCOL + " run_fdsimulation H_ext_0 H_ext_1 H_ext_2 M_Py_0 M_Py_1 M_Py_2 > fd.dat")
os.system("gnuplot plot.gnp")
half_sy_m = 0.5*float(pb.sy/m)
def film(pos):
x, y, _ = rotate(pos, -pb.angle)
if (x >= -half_sx_m and x <= half_sx_m and
y >= -half_sy_m and y <= half_sy_m):
return 'magnetic'
else:
return None
s.create_mesh([container_discr, container_discr, pb.nz],
[pb.dx_dy, pb.dx_dy, pb.dz],
mat_Py, regions=film,
origin=(pb.sx*0.5, pb.sy*0.5, pb.sz*0.5))
s.set_m(pb.m0)
Hs = nmag.vector_set(direction=rotate([0.0, 1.0, 0.0], pb.angle),
norm_list=[0.0, 0.0015, 0.003, 0.004,
0.0045, 0.0001, 0.0065],
units=1e6*SI('A/m'))
reference_mz = []
def check_switching_field(s):
m = s.get_subfield_average('m')
mz = abs(m[2])
if len(reference_mz) == 0:
reference_mz.append(mz)
else:
(mz0, ) = reference_mz
s = FDSimulation(do_demag=True)
s.set_params(stopping_dm_dt=20 * degrees_per_ns)
nm = SI(1e-9, "m")
def rectangle(pos):
# if (pos[0] >=10e-9 and pos[0] <= 20e-9 and
# pos[1] >=10e-9 and pos[1] <= 20e-9):
return "magnetic"
# else:
# return None
s.create_mesh([5, 5, 1], [5.0 * nm, 5.0 * nm, 3.0 * nm], mat_Py, regions=rectangle)
s.set_m([1, 1, 1])
Hs = nmag.vector_set(
direction=[1.0, 1.0, 1.0], norm_list=[1.00, 0.95, [], 0.1, 0.09, [], -0.1, -0.15, [], -1.00], units=1e6 * SI("A/m")
)
s.hysteresis(Hs, save=[("field_m", at("time", SI(0, "s")) | at("convergence"))])
# Process the results
NCOL = os.path.join(os.path.dirname(os.path.abspath(nmag.__file__)), "../../bin/ncol")
os.system(NCOL + " run_fdsimulation H_ext_0 H_ext_1 H_ext_2 M_Py_0 M_Py_1 M_Py_2 > fd.dat")
os.system("gnuplot plot.gnp")