# Thermally induced antiferromagnetic exchange in magnetic multilayers

## TL;DR

This paper reports a method to switch magnetic coupling in multilayers by temperature, using a spacer that changes magnetic state at its Curie temperature, enabling controlled magnetic state transitions.

## Contribution

It introduces a novel thermally-induced switching mechanism in spin-valves utilizing a spacer with a Curie transition to control magnetic exchange.

## Key findings

- Sharp switching between ferromagnetic and antiferromagnetic states
- The switching is driven by the spacer's Curie transition
- Effective spacer thickness change causes the exchange variation

## Abstract

We demonstrate sharp thermally-induced switching between ferromagnetic and antiferromagnetic RKKY exchange in a spin-valve with the spacer incorporating a thin diluted ferromagnetic layer as the core. We illustrate the mechanism behind the effect as due to a change in the effective thickness of the spacer induced by the Curie transition into its paramagnetic state.