In this work, we study magnon-magnon coupling in synthetic antiferromagnets (SyAFs) using microwave spectroscopy at room temperature. Two distinct spin-wave modes are clearly observed and are hybridised at degeneracy points. We provide a phenomenological model that captures the coupling phenomena and experimentally demonstrate that the coupling strength is controlled by the out-of-plane tilt angle as well as the interlayer exchange field. We numerically show that a spin-current mediated damping in SyAFs plays a role in influencing the coupling strength.
@article{arxiv.2006.11633,
title = {Tunable magnon-magnon coupling in synthetic antiferromagnets},
author = {A. Sud and C. W. Zollitsch and A. Kamimaki and T. Dion and S. Khan and S. Iihama and S. Mizukami and H. Kurebayashi},
journal= {arXiv preprint arXiv:2006.11633},
year = {2020}
}