sw_mattype

Syntax

type = sw_mattype(mat)

type = sw_mattype(mat,epsilon)

Description

type = sw_mattype(mat) determines the type of the input matrix mat which stacked $[3\times 3]$ matrices. It determines the type of exchnge interaction that the matrix belongs to.

Input Arguments

mat

Matrix with dimensions of $[3\times 3\times N]$.

epsilon

optional error bar on small matrix elements, default value is $10^{-5}$.

Output Arguments

type

Row vector with $N$ elements each having one of the following value:

• 1 Heisenberg exchange,
• 2 anisotropic exchange,
• 3 DM interaction,
• 4 general matrix.