Temperature dependence of EPR linewidth in one-dimensional magnets: A quasi-classical approach

Abstract

An analytical expression for the EPR linewidth of an exchange-coupled 1/2-spin chain originating from uniform Dzyaloshinskii-Moriya interaction is derived using a quasi-classical approach. The expression successfully reproduces the results obtained by numerical quantum mechanical calculations based on Green's function method at T > 2J/k B. © 2013 Allerton Press, Inc.