Tunable magnon-magnon coupling in synthetic antiferromagnets
arXiv:2006.11633 · doi:10.1103/PhysRevB.102.100403
Abstract
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.
13 pages, 11 figures(including supplementary)
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- Symmetry effects on the static and dynamic properties of coupled magnetic oscillators
- Diverging entanglement of critical magnons in easy-axis antiferromagnets
- Observation of thermally activated coherent magnon-magnon coupling in a magnonic hybrid system
- Observation of a non-reciprocal skyrmion Hall effect of hybrid chiral skyrmion tubes in synthetic antiferromagnetic multilayers
- Ground states and magnonics in orthogonally-coupled symmetric all-antiferromagnetic junctions