A magnetization equation for non-equilibrium spin systems

TL;DR

This paper derives a general magnetization equation for non-equilibrium spin systems, applicable to various interactions and relaxation processes, enhancing understanding of spin dynamics beyond equilibrium conditions.

Contribution

It introduces a universal magnetization equation for non-adiabatic, out-of-equilibrium spins without relying on specific internal interactions.

Findings

Provides a general form of magnetization damping.

Considers a special case of spin-spin exchange interaction.

Applicable to non-equilibrium spin dynamics.

Abstract

A magnetization equation for a system of spins evolving non-adiabatically and out of equilibrium is derived without specifying the internal interactions. For relaxation processes, this equation provides a general form of magnetization damping. A special case of the spin-spin exchange interaction is considered.