def skyrmion_number(self):
nx = self.mesh.nx
ny = self.mesh.ny
nz = self.mesh.nz
number = clib.compute_skyrmion_number(self.spin, self._skx_number, nx,
ny, nz, self.mesh.neighbours)
return number
def skyrmion_number(self):
nx = self.mesh.nx
ny = self.mesh.ny
nz = self.mesh.nz
number = clib.compute_skyrmion_number(
self.spin, self._skx_number, nx, ny, nz, self.mesh.neighbours)
return number
def skyrmion_number(self, method='FiniteSpinChirality'):
"""
Calculate the skyrmion number using different methods:
method :: 'FiniteSpinChirality', 'BergLuscher'
which are specifically defined for discrete spin lattices.
Calling this function will fill the _skx_number array with the skyrmion
number density per lattice site.
It is important to mention that this calculation only works for a
2D layer in the XY plane.
See the corresponding C code at fidimag/atomistic/lib/util.c for a
detailed documentation about the methods.
"""
nx = self.mesh.nx
ny = self.mesh.ny
nz = self.mesh.nz
if method == 'FiniteSpinChirality':
if self.mesh.mesh_type == 'cuboid':
number = clib.compute_skyrmion_number(self.spin,
self._skx_number, nx, ny,
nz, self.mesh.neighbours,
self.mesh.n_ngbs)
else:
raise ValueError('FiniteSpinChirality method only'
' defined for cuboid meshes')
elif method == 'BergLuscher':
number = clib.compute_skyrmion_number_BergLuscher(
self.spin, self._skx_number, nx, ny, nz, self.mesh.neighbours,
self.mesh.n_ngbs)
else:
raise ValueError('Specify a valid method')
return number
def skyrmion_number(self, method='FiniteSpinChirality'):
"""
Calculate the skyrmion number using different methods:
method :: 'FiniteSpinChirality', 'BergLuscher'
which are specifically defined for discrete spin lattices.
Calling this function will fill the _skx_number array with the skyrmion
number density per lattice site.
It is important to mention that this calculation only works for a
2D layer in the XY plane.
See the corresponding C code at fidimag/atomistic/lib/util.c for a
detailed documentation about the methods.
"""
nx = self.mesh.nx
ny = self.mesh.ny
nz = self.mesh.nz
if method == 'FiniteSpinChirality':
if self.mesh.mesh_type == 'cuboid':
number = clib.compute_skyrmion_number(
self.spin, self._skx_number, nx, ny, nz,
self.mesh.neighbours)
else:
raise ValueError('FiniteSpinChirality method only'
' defined for cuboid meshes')
elif method == 'BergLuscher':
number = clib.compute_skyrmion_number_BergLuscher(
self.spin, self._skx_number, nx, ny, nz,
self.mesh.neighbours)
else:
raise ValueError('Specify a valid method')
return number
