Magnomechanical Coupling in Suspended 2D van der Waals Ferromagnets

TL;DR

This paper demonstrates that suspended 2D van der Waals ferromagnets can achieve strong, tunable magnomechanical coupling via magnetoelastic interactions, surpassing traditional bulk systems and enabling advanced hybrid magnon-phonon applications.

Contribution

The study reveals that suspended membranes of 2D van der Waals ferromagnets exhibit large, tunable magnomechanical coupling dominated by magnetoelastic effects, with rates exceeding previous bulk systems.

Findings

Magnomechanical coupling rate can reach hundreds of Hertz to low kiloHertz.

Coupling rate scales linearly with pre-strain.

Rate exceeds values reported for YIG spheres by over three orders of magnitude.

Abstract

Magnomechanical systems provide a promising route for exploring coherent hybrid magnon-phonon interactions and hybrid information processing, but their realization has so far been limited by weak magnon-phonon coupling in conventional bulk platforms. We show that a suspended membrane of a two-dimensional van der Waals ferromagnet with in-plane magnetization and out-of-plane mechanical oscillations exhibits large magnomechanical coupling dominated by magnetoelastic interactions. The parametric single magnon-phonon coupling rate scales linearly with pre-strain and can reach hundreds of Hertz to low kiloHertz in suspended membranes of van der Waals ferromagnets such as CrGeTe_3 under experimentally realistic conditions. This rate exceeds typical values reported for YIG spheres by more than three orders of magnitude. Our results demonstrate that suspended membranes of van der Waals magnets provide a robust and highly tunable platform for magnomechanics.