Magnetoelastic Control of Nanomagnet Dynamics

The dynamics of spin wavesSpin wave (SW), or magnonsMagnons, in nanomagnetsNanomagnets offer a unique opportunity to couple magnonic systems with various other systems due to their tunability at microwave frequencies. A particularly compelling area of research is the coupling between magnetic and mechanical oscillations, which can be either traveling acoustic waves or localized vibrations determined by the sample geometry. Recent studies of magnonMagnons-phonon coupling in nanostructures have revealed significant potential for applications such as energy-efficient and nonvolatile straintronicStraintronics logic and memory technologies, thermal devices, magnetoelastic metamaterials, low-power spin-wave computingSpin wave computing, and hybrid quantum systems for quantum information technology. This chapter provides a comprehensive review of magnetization dynamics in nanomagnetsNanomagnets under the influence of magnetoelastic coupling. We explore how magnetoelastic effects can perturb intrinsic magnetization dynamics, how these effects can be controlled through sample geometry and experimental design, and how to maximize these effects to achieve strong magnonMagnons-phonon coupling. The chapter is structured as follows: a review of magnetization dynamics in thin films is followed by a discussion of fundamentals of magnetostrictionMagnetostriction and the magnetoelastic effect. We then describe excitation and detection methods for hybrid magnonMagnons-phonon quantum systems, and provide a detailed analysis of strong coupling in magnetic thin films, in single nanomagnetsNanomagnets, and in other systems. Finally, we discuss future directions and potential applications of magnetoelastic coupling in emerging technologies.