# Thermal switching of indirect interlayer exchange in magnetic multilayers

## TL;DR

This paper demonstrates a magnetic multilayer system where the indirect exchange coupling can be thermally switched on and off within a narrow temperature range, enabling tunable thermal control of magnetic interactions.

## Contribution

It introduces a novel multilayer design allowing precise thermal switching of IEC, expanding the control over magnetic nanostructures.

## Key findings

- Thermal switching widths as small as 10-20 K.
- Switching achievable near room temperature.
- Potential for tunable thermal control in magnetic devices.

## Abstract

We propose a magnetic multilayer layout, in which the indirect exchange coupling (IEC also known as RKKY) can be switched on and off by a slight change in temperature. We demonstrate such on/off IEC switching in a Fe/Cr/FeCr-based system and obtain thermal switching widths as small as 10--20~K, essentially in any desired temperature range, including at or just above room temperature. These results add a new dimension of tunable thermal control to IEC in magnetic nanostructures, highly technological in terms of available materials and operating physical regimes.