Carrier mediated interlayer exchange, ground state phase diagrams and transition temperatures of magnetic thin films

TL;DR

This paper explores how carrier density influences interlayer exchange in magnetic thin films, using a Kondo-lattice model to analyze phase diagrams and transition temperatures across various parameters.

Contribution

It introduces a comprehensive analysis of carrier-mediated interlayer exchange in magnetic thin films using a Green's function approach and free energy minimization.

Findings

Magnetic phase diagrams over broad parameter ranges

Dependence of interlayer exchange on carrier density

Calculated transition temperatures for different magnetic alignments

Abstract

We investigate the influence of the carrier density and other parameters on the interlayer exchange in magnetic thin film systems. The system consists of ferromagnetic and non-magnetic layers where the carriers are allowed to move from layer to layer. For the ferromagnetic layers we use the Kondo-lattice model to describe interactions between itinerant electrons and local moments. The electrons' properties are calculated by a Green's function's equation of motion approach while the magnetization of the local moments is determined by a minimization of the free energy. As results we present magnetic phase diagrams and the interlayer exchange over a broad parameter range. Additionally we can calculate the transition temperatures for different alignments of the ferromagnetic layers' magnetizations.