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.

中文翻译：

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动态反作用磁力学

由光机械系统中的辐射压力引起的动态反作用已被证明是一种用于操纵机械振动的通用工具。值得注意的是，动态反作用导致机械谐振器冷却到其基态，驱动声子激光，产生纠缠态，以及观察光学弹簧效应。在某些磁性材料中，机械振动可以通过磁致伸缩相互作用与磁激励（磁振子）相互作用，导致类似的磁振子引起的动态反作用。在本文中，我们直接观察了磁振子引起的动态反作用对球形磁性样品机械振动的影响。此外，动态反作用效应在许多最近的理论提议中起着至关重要的作用。因此，