Interlayer exchange coupling: Preasymptotic corrections

TL;DR

This paper develops a systematic method to calculate preasymptotic corrections to interlayer exchange coupling decay, including temperature effects, with applications to Co/Cu/Co(001) systems.

Contribution

It introduces a systematic procedure for calculating higher-order preasymptotic corrections to interlayer exchange coupling decay.

Findings

Preasymptotic corrections are significant for spacer thicknesses relevant in experiments.

Temperature influences the magnitude of preasymptotic corrections.

Application to Co/Cu/Co(001) systems demonstrates the method's practical relevance.

Abstract

In the asymptotic limit, the interlayer exchange coupling decays as $D^{-2}$, where $D$ is the spacer thickness. A systematic procedure for calculating the preasymptotic corrections, i.e., the terms of order $D^{-n}$ with $n \ge 3$, is presented. The temperature dependence of the preasymptotic corrections is calculated. The results are used to discuss the preasymptotic corrections for the Co/Cu/Co(001) system.