Nanomagnonic waveguides based on reconfigurable spin-textures for spin computing

TL;DR

This paper demonstrates advanced control of nanoscale spin-waves using reconfigurable magnetic textures, enabling efficient magnonic circuits without external fields, which advances miniaturization for spin-based computing.

Contribution

It introduces a novel method for manipulating spin-waves in nanostructures via patterned reconfigurable spin-textures, overcoming fabrication challenges.

Findings

Direct imaging of spin-wave channeling in nanomagnonic waveguides.

Reconfigurable domain walls steer spin-waves without external fields.

Prototypic circuit shows tunable spin-wave interactions.

Abstract

Magnonics is gaining momentum as an emerging technology for information processing. The wave character and Joule heating-free propagation of spin-waves hold promises for highly efficient analog computing platforms, based on integrated magnonic circuits. Miniaturization is a key issue but, so far, only few examples of manipulation of spin-waves in nanostructures have been demonstrated, due to the difficulty of tailoring the nanoscopic magnetic properties with conventional fabrication techniques. In this Letter, we demonstrate an unprecedented degree of control in the manipulation of spin-waves at the nanoscale by using patterned reconfigurable spin-textures. By space and time-resolved scanning transmission X-ray microscopy imaging, we provide direct evidence for the channeling and steering of propagating spin-waves in arbitrarily shaped nanomagnonic waveguides based on patterned domain walls, with no need for external magnetic fields or currents. Furthermore, we demonstrate a prototypic nanomagnonic circuit based on two converging waveguides, allowing for the tunable spatial superposition and interaction of confined spin-waves modes.