SpinWaveToolkit.bls.susceptibilities

Below you will find links to detailed documentation of the classes, functions, etc. of this submodule.

Submodule parts

• Functions
  • mo_linear()
  • mo_quadratic()
  • mo_quadratic_yig111()

Module of the bls submodule for calculations of magneto-optic susceptibilities used in (but not limited to) BLS calculations.

The magneto-optic (MO) susceptibility tensors can also be used for static calculations, such as Kerr microscopy, but the linearized versions are particularly important for dynamic effects like BLS, where the static magnetization is along a principal axis and only the dynamic magnetization components contribute to the (frequency-dependent) susceptibility.

If these functions are used for fitting experimental BLS data, note that sometimes the MO constants are coupled, meaning that the number of independent constants is reduced. This is because in ferromagnetic materials, the magnitude of magnetization is constant. For further discussion of this, see, e.g., Hamrlova et al. JMMM 420, 142-151 (2016) or Hamrlova et al. PSSB 250(10), 2194-2205 (2013).

mo_linear(m[, Q])	The magneto-optic Kerr (or Faraday) susceptibility tensor (linear in magnetization) for a given magnetization vector.
mo_quadratic(m[, Bii, Bij, linearize_along])	The magneto-optic Cotton-Mouton (or Voigt) susceptibility tensor (quadratic in magnetization) for a given magnetization vector.
mo_quadratic_yig111(m, g11, g12, g44[, ...])	The magneto-optic Cotton-Mouton (or Voigt) susceptibility tensor (quadratic in magnetization) for a given magnetization vector, specifically for a YIG(111) film, using the constants g11, g12, g44.