Exemple #1
0
  def test_llge(self):
    mesh = RectangularMesh((10,10,10), (1e-9,1e-9,1e-9))
    f1, f2, M, H, dM = Field(mesh), Field(mesh), VectorField(mesh), VectorField(mesh), VectorField(mesh)
    
    # dM = f1*MxH + f2*Mx(MxH)
    f1.fill(10)
    f2.fill(20)
    M.fill((5,10,15))
    H.fill((20,25,30))
    magneto.llge(f1, f2, M, H, dM)

    for idx in range(dM.size()):
      self.assertEqual(dM.get(idx), (-60750.0, -13500.0, 29250.0))
Exemple #2
0
    def test_llge(self):
        mesh = RectangularMesh((10, 10, 10), (1e-9, 1e-9, 1e-9))
        f1, f2 = Field(mesh), Field(mesh)
        M, H, dM = VectorField(mesh), VectorField(mesh), VectorField(mesh)

        # dM = f1*MxH + f2*Mx(MxH)
        f1.fill(10)
        f2.fill(20)
        M.fill((5, 10, 15))
        H.fill((20, 25, 30))
        magneto.llge(f1, f2, M, H, dM)

        for idx in range(dM.size()):
            self.assertEqual(dM.get(idx), (-60750.0, -13500.0, 29250.0))
    def calculate_minimizer_dM(self, state):
        # TODO other LLG terms?
        if not self.__valid_factors: self.__initFactors()

        if hasattr(state.cache, "minimizer_dM"): return state.cache.minimizer_dM
        result = state.cache.minimizer_dM = VectorField(self.system.mesh)

        # Get effective field
        H_tot = self.calculate_H_tot(state)

        # TODO do this in every step?
        zero = Field(self.system.mesh)
        zero.fill(0.0)

        magneto.llge(zero, self.__f2, state.M, H_tot, result)

        return result
    def calculate_minimizer_dM(self, state):
        # TODO other LLG terms?
        if not self.__valid_factors: self.__initFactors()

        if hasattr(state.cache, "minimizer_dM"):
            return state.cache.minimizer_dM
        result = state.cache.minimizer_dM = VectorField(self.system.mesh)

        # Get effective field
        H_tot = self.calculate_H_tot(state)

        # TODO do this in every step?
        zero = Field(self.system.mesh)
        zero.fill(0.0)

        magneto.llge(zero, self.__f2, state.M, H_tot, result)
        return result
  def calculate_dMdt(self, state):
    if not self.__valid_factors: self.__initFactors()

    if hasattr(state.cache, "dMdt"): return state.cache.dMdt
    dMdt = state.cache.dMdt = VectorField(self.system.mesh)

    # Get effective field
    H_tot = self.calculate_H_tot(state)
    
    # Basic term
    magneto.llge(self.__f1, self.__f2, state.M, H_tot, dMdt)
 
    # Optional other terms
    for dMdt_str in self.llge_terms:
      dMdt_i = getattr(state, dMdt_str)
      dMdt.add(dMdt_i)

    return dMdt
    def calculate_dMdt(self, state):
        if not self.__valid_factors:
            self.__initFactors()

        if hasattr(state.cache, "dMdt"): return state.cache.dMdt
        dMdt = state.cache.dMdt = VectorField(self.system.mesh)

        # Get effective field
        H_tot = self.calculate_H_tot(state)

        # Basic term
        magneto.llge(self.__f1, self.__f2, state.M, H_tot, dMdt)

        # Optional other terms
        for dMdt_id in self.llge_terms:
            dMdt_i = getattr(state, dMdt_id)
            dMdt.add(dMdt_i)

        return dMdt
    def calculate_minimizer_dM_minimize_BB(self, state):
        # TODO other LLG terms?
        if not self.__valid_factors: self.__initFactors()

        if hasattr(state.cache, "minimizer_dM_minimize_BB"):
            return state.cache.minimizer_dM_minimize_BB
        result = state.cache.minimizer_dM_minimize_BB = VectorField(
            self.system.mesh)

        # Get effective field
        H_tot = self.calculate_H_tot(state)

        # TODO do this in every step?
        zero = Field(self.system.mesh)
        zero.fill(0.0)

        # changed; set llge coefficient to 1.0 for minimization
        factor = Field(self.system.mesh)
        factor.fill(1.)
        magneto.llge(zero, factor, state.M, H_tot, result)
        return result