Dynamical Backaction Magnomechanics

TL;DR

This paper demonstrates the direct observation of magnon-induced dynamical backaction affecting mechanical vibrations in a magnetic sample, laying groundwork for future experimental exploration of related theoretical proposals.

Contribution

It provides the first direct experimental evidence of magnon-induced dynamical backaction on mechanical vibrations in magnetic materials.

Findings

Observed magnon-induced dynamical backaction on a spherical magnetic sample

Established a foundation for future experiments on magnon-mechanics interactions

Connected experimental results to recent theoretical proposals

Abstract

Dynamical backaction resulting from radiation pressure forces in optomechanical systems has proven to be a versatile tool for manipulating mechanical vibrations. Notably, dynamical backaction has resulted in the cooling of a mechanical resonator to its ground-state, driving phonon lasing, the generation of entangled states, and observation of the optical-spring effect. In certain magnetic materials, mechanical vibrations can interact with magnetic excitations (magnons) via the magnetostrictive interaction, resulting in an analogous magnon-induced dynamical backaction. In this article, we directly observe the impact of magnon-induced dynamical backaction on a spherical magnetic sample's mechanical vibrations. Moreover, dynamical backaction effects play a crucial role in many recent theoretical proposals; thus, our work provides the foundation for future experimental work pursuing many of these theoretical proposals.