Oscillatory Exchange Coupling across Cr$_{(1-x)}$V$_x$ Alloy spacers

TL;DR

This paper investigates the origin of oscillatory exchange coupling in multilayers with Cr and Cr-V alloy spacers, linking the oscillation periods to specific features of the Fermi surface through experiments and calculations.

Contribution

It identifies the Fermi surface features responsible for magnetic coupling oscillations in Cr and Cr-V alloy multilayers, combining experimental data with KKR-CPA calculations.

Findings

Oscillation periods are determined by extremal wave vectors of hole pockets.

Fermi surface analysis explains the long period oscillations.

Experimental and computational results are consistent.

Abstract

We have identified the pieces of the Fermi surface responsible for the long period oscillations of magnetic coupling across Cr and Cr$_{(1-x)}$V$_x$ alloy spacers in metallic multilayers. Analysing experiments and results of KKR-CPA calculations we find that the periods are determined by the extremal wave~vectors of the hole pockets centered on the N-point in the Brillouin zone.