def oommf_uniform_exchange(s0, Ms, A):
assert type(s0) is MeshField and s0.dims == (3,)
res = calculate_oommf_fields(
"uniform_exchange",
s0,
Ms,
mesh_spec(s0.mesh) + "\nSpecify Oxs_UniformExchange { A %25.15e }" % A,
fields=["Oxs_UniformExchange::Field", "Oxs_TimeDriver::Spin"],
)
exchange_field = res["Oxs_UniformExchange-Field"]
s_field = res["Oxs_TimeDriver-Spin"]
assert exchange_field.dims == (3,)
if not (np.max(np.abs(s_field.flat - s0.flat)) < 1e-14):
print s_field.flat
print s0.flat
assert np.max(np.abs(s_field.flat - s0.flat)) < 1e-14
return exchange_field
def oommf_demag(s0, Ms):
assert type(s0) is MeshField and s0.dims == (3,)
res = calculate_oommf_fields(
"demag",
s0,
Ms,
mesh_spec(s0.mesh) + "\nSpecify Oxs_Demag {}",
fields=["Oxs_Demag::Field", "Oxs_TimeDriver::Spin"],
)
demag_field = res["Oxs_Demag-Field"]
s_field = res["Oxs_TimeDriver-Spin"]
assert demag_field.dims == (3,)
if not (np.max(np.abs(s_field.flat - s0.flat)) < 1e-14):
print s_field.flat
print s0.flat
assert np.max(np.abs(s_field.flat - s0.flat)) < 1e-14
return demag_field
def oommf_fixed_zeeman(s0, Ms, H):
assert type(s0) is MeshField and s0.dims == (3,)
res = calculate_oommf_fields(
"fixed_zeeman",
s0,
Ms,
mesh_spec(s0.mesh) + "\nSpecify Oxs_FixedZeeman { field {%25.16e %25.16e %25.16e} }" % (H[0], H[1], H[2]),
fields=["Oxs_FixedZeeman::Field", "Oxs_TimeDriver::Spin"],
)
field = res["Oxs_FixedZeeman-Field"]
s_field = res["Oxs_TimeDriver-Spin"]
assert field.dims == (3,)
if not (np.max(np.abs(s_field.flat - s0.flat)) < 1e-14):
print s_field.flat
print s0.flat
assert np.max(np.abs(s_field.flat - s0.flat)) < 1e-14
return field
def oommf_uniaxial_anisotropy(m0, Ms, K1, axis):
assert type(m0) is MeshField and m0.dims == (3,)
res = calculate_oommf_fields(
"uniaxial_anisotropy",
m0,
Ms,
mesh_spec(m0.mesh)
+ "\nSpecify Oxs_UniaxialAnisotropy { K1 %25.15e axis { %25.15e %25.15e %25.15e } }"
% (K1, axis[0], axis[1], axis[2]),
fields=["Oxs_UniaxialAnisotropy::Field", "Oxs_TimeDriver::Spin"],
)
uniaxial_anisotropy_field = res["Oxs_UniaxialAnisotropy-Field"]
m_field = res["Oxs_TimeDriver-Spin"]
assert uniaxial_anisotropy_field.dims == (3,)
if not (np.max(np.abs(m_field.flat - m0.flat)) < 1e-14):
print m_field.flat
print m0.flat
assert np.max(np.abs(m_field.flat - m0.flat)) < 1e-14
return uniaxial_anisotropy_field
def oommf_dmdt(s0, Ms, A, H, alpha, gamma_G):
assert type(s0) is MeshField and s0.dims == (3,)
# disable everything besides the external field for better comparison.
res = calculate_oommf_fields(
"dmdt",
s0,
Ms,
mesh_spec(s0.mesh) + "\nSpecify Oxs_FixedZeeman { field {%25.16e %25.16e %25.16e} }" % (H[0], H[1], H[2]),
alpha=alpha,
gamma_G=gamma_G,
fields=["Oxs_RungeKuttaEvolve:evolver:dm/dt", "Oxs_TimeDriver::Spin"],
)
field = res["Oxs_RungeKuttaEvolve-evolver-dm_dt"]
s_field = res["Oxs_TimeDriver-Spin"]
assert field.dims == (3,)
if not (np.max(np.abs(s_field.flat - s0.flat)) < 1e-14):
print s_field.flat
print s0.flat
assert np.max(np.abs(s_field.flat - s0.flat)) < 1e-14
return field
def oommf_cubic_anisotropy(m0, Ms, u1, u2, K1, K2=0, K3=0):
assert type(m0) is MeshField and m0.dims == (3,)
res = calculate_oommf_fields(
"cubic_anisotropy",
m0,
Ms,
mesh_spec(m0.mesh)
+ """\nSpecify Southampton_CubicAnisotropy8 {
K1 %25.15e K2 %25.15e K3 %25.15e axis1 { %25.15e %25.15e %25.15e }
axis2 { %25.15e %25.15e %25.15e } }"""
% (K1, K2, K3, u1[0], u1[1], u1[2], u2[0], u2[1], u2[2]),
fields=["Southampton_CubicAnisotropy8::Field", "Oxs_TimeDriver::Spin"],
)
cubic_anisotropy_field = res["Southampton_CubicAnisotropy8-Field"]
m_field = res["Oxs_TimeDriver-Spin"]
assert cubic_anisotropy_field.dims == (3,)
if not (np.max(np.abs(m_field.flat - m0.flat)) < 1e-14):
print m_field.flat
print m0.flat
assert np.max(np.abs(m_field.flat - m0.flat)) < 1e-14
return cubic_anisotropy_field