# Domain wall-based spin-Hall nano-oscillators

## TL;DR

This paper demonstrates the excitation of magnetic auto-oscillations within nanoscale domain walls using pure spin currents, bridging the gap between domain wall memory and neuromorphic computing concepts.

## Contribution

It introduces a novel method to induce auto-oscillations in domain walls, integrating two major nano magnetism concepts for storage and neuromorphic applications.

## Key findings

- Auto-oscillations are excited inside nanoscale domain walls.
- Pure spin currents can induce magnetic auto-oscillations.
- Bridges the gap between domain wall memory and neuromorphic computing.

## Abstract

In the last decade, two revolutionary concepts in nano magnetism emerged from research for storage technologies and advanced information processing. The first suggests the use of magnetic domain walls (DWs) in ferromagnetic nanowires to permanently store information in DW racetrack memories. The second proposes a hardware realisation of neuromorphic computing in nanomagnets using nonlinear magnetic oscillations in the GHz range. Both ideas originate from the transfer of angular momentum from conduction electrons to localised spins in ferromagnets, either to push data encoded in DWs along nanowires or to sustain magnetic oscillations in artificial neurones. Even though both concepts share a common ground, they live on very different time scales which rendered them incompatible so far. Here, we bridge both ideas by demonstrating the excitation of magnetic auto-oscillations inside nano-scale DWs using pure spin currents.