Numerical solutions of the Fokker–Planck equation by the finite difference method for the thermally assisted reversal of the magnetization in a single-domain particle

For an applied field at an oblique angle, a few degrees, to the easy axis it is shown that a truncated Fourier series expansion can be an approximate solution to the Fokker–Planck equation. Attempt frequency and switching time were calculated under different conditions. For an applied field along the easy axis an integral function is introduced to solve accurately.