# pair_style spin/dmi command

## Syntax

pair_style spin/dmi cutoff

• cutoff = global cutoff pair (distance in metal units)

## Examples

pair_style spin/dmi 4.0
pair_coeff * * dmi 2.6 0.001 1.0 0.0 0.0
pair_coeff 1 2 dmi 4.0 0.00109 0.0 0.0 1.0


## Description

Style spin/dmi computes the Dzyaloshinskii-Moriya (DM) interaction between pairs of magnetic spins:

where si and sj are two neighboring magnetic spins of two particles, eij = (ri - rj)/|ri-rj| is the normalized separation vector between the two particles, and D is the DM vector defining the intensity and the sign of the interaction.