Magnon-bandgap controllable artificial domain wall waveguide

TL;DR

This paper proposes a controllable artificial domain wall waveguide for spin waves, demonstrating tunable magnon bandgaps and improved structural stability, advancing magnonic device miniaturization and integration.

Contribution

It introduces a novel magnon-bandgap controllable artificial domain wall waveguide with tunable properties via micromagnetic simulation, enhancing device stability and functionality.

Findings

Magnon bandgap can be controlled by the effective exchange field.

Artificial domain wall waveguides are more stable than natural ones.

Bandgap tuning is possible through width and magnetic anisotropy adjustments.

Abstract

In this paper, a magnon-bandgap controllable artificial domain wall waveguide is proposed by means of micromagnetic simulation. By the investigation of the propagation behavior and dispersion relationship of spin waves in artificial domain wall waveguides, it is found that the nonreciprocal propagation of spin waves in the artificial domain walls are mainly affected by the local effective exchange field, and the magnon bandgap can be controlled by changing the maximum value of the effective exchange field. In addition, it is observed that the artificial domain wall waveguides are structurally more stable than the natural domain wall waveguides under the same spin wave injection conditions, and the magnon bandgap of the artificial domain wall waveguides can be adjusted by its width and magnetic anisotropy parameters. The bandgap controllable artificial domain wall scheme is beneficial to the miniaturization and integration of magnon devices and can be applied to future magnonic technology as a novel frequency filter.