Tunable magnon-magnon coupling in synthetic antiferromagnets
A. Sud, Christoph W. Zollitsch, Akira Kamimaki, Troy Dion, Safe Khan, Satoshi Iihama, Shigemi Mizukami, H. Kurebayashi
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 hybridized 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.
Topics & Concepts
MagnonDegeneracy (biology)Condensed matter physicsCoupling (piping)Phenomenological modelPhysicsField (mathematics)Coupling strengthMicrowaveSpin (aerodynamics)SpectroscopyFerromagnetismMaterials scienceQuantum mechanicsMathematicsBiologyPure mathematicsBioinformaticsMetallurgyThermodynamicsPhysics of Superconductivity and MagnetismMagnetic properties of thin filmsMagneto-Optical Properties and Applications