Abstract: Engineering magnetization dynamics via phonons 

The coupling of different degrees of freedom is a key ingredient of solid-state physics. Some questions, however, require the control over the coupling strength, which is typically realized in so-called hybrid systems. Here, the interaction between excitations, such as magnons, phonons, photons, or spins, are reliably engineered. Quantum sciences and applications harness these settings for information conversion, storage, sensing applications, or for investigating the quantum properties of these excitations. In addition, the hybrid systems are interesting from the perspective of novel functionalities arising from the emerging, mixed character of the participating modes.

In my presentation, I will discuss a hybrid system based on phonons and magnons. This system is interesting from a magnon-damping perspective, as phonons are considered a dominant magnon relaxation channel. Moreover, a large coupling between magnons and phonons can create a magnon-phonon hybrid. Thus, the magnons are expected to imprint the angular momentum properties onto the phonons, which is interesting in the context of phonon-mediated angular momentum transport. I will present our results on controlled magnon-phonon interaction using a heterostructure consisting of a magnetic thin film integrated in a phononic resonator.