Precession-free domain wall dynamics in compensated ferrimagnets

TL;DR

This paper demonstrates that in compensated ferrimagnets, domain wall precession is eliminated, leading to record mobility and faster, more efficient spintronic device operation, by tuning net angular momentum.

Contribution

It shows that domain wall precession can be fully suppressed in ferrimagnets at the compensated angular momentum point, enhancing dynamics for spintronics.

Findings

Domain wall precession vanishes at TAC in ferrimagnets.

Record mobility achieved in DWs driven by spin-orbit torque.

Faster and more efficient magnetic dynamics demonstrated.

Abstract

One fundamental obstacle to efficient ferromagnetic spintronics is magnetic precession, which intrinsically limits the dynamics of magnetic textures, We demonstrate that the domain wall precession fully vanishes with a record mobility when the net angular momentum is compensated (TAC) in DWs driven by spin-orbit torque in a ferrimagnetic GdFeCo/Pt track. We use transverse in-plane fields to reveal the internal structure of DWs and provide a robust and parameter-free measurement of TAC. Our results highlight the mechanism of faster and more efficient dynamics in materials with multiple spin lattices and reduced net angular momentum, promising for high-speed, low-power spintronics applications.