Evidence of standing spin-waves in a van der Waals magnetic material

Abstract

Spin-waves have been studied for data storage, communication and logic circuits in the field of spintronics based on their potential to substitute electrons. Recent discovery of magnetism in two-dimensional (2D) systems such as monolayer CrI${}_3$ and Cr${}_2$Ge${}_2$Te${}_6$ has led to a renewed interest in such applications of magnetism in the 2D limit. Here we present direct evidence of standing spin-waves along with the uniform precessional resonance modes in van der Waals magnetic material, CrCl${}_3$. Our experiment is the first direct observation of standing spin-wave modes, set up across a thickness of 20 $\mu$m, in a van der Waals material. We detect standing spin-waves in the vicinity of both, optical and acoustic, branches of the antiferromagnetic resonance. We also observe magnon-magnon coupling, softening of resonance modes with temperature and extract the evolution of interlayer exchange field as a function of temperature.

11 pages, 10 figures

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Cited by in corpus (13)

• Direct observation of 2D magnons in atomically thin CrI${}_3$
• Strong Magnon-Magnon Coupling in Synthetic Antiferromagnets
• Monolayer CrCl${}_3$ as an ideal Test Bed for the Universality Classes of 2D Magnetism
• Probing spin dynamics of ultra-thin van der Waals magnets via photon-magnon coupling
• Gapless Dirac magnons in CrCl${}_3$
• Ultrafast laser-driven topological spin textures on a 2D magnet
• Coplanar cavity for strong coupling between photons and magnons in van der Waals antiferromagnet
• Electron Spin Resonance Spectroscopy on Magnetic Van der Waals Compounds
• Damping Enhancement in YIG at Millikelvin Temperatures due to GGG Substrate
• Magnon dispersion and spin transport in CrCl${}_3$ bilayers under different strain-induced magnetic states
• Magnetic resonance and microwave resistance modulation in van der Waals colossal-magnetoresistance material
• Cavity based sensing of antiferromagnetic canting and nonzero-momentum spin waves in a van der Waals cavity-magnon-polariton system
• Probing GHz Spin Dynamics Across Magnetic Phase Transitions in CrCl3 Nanoflakes Using Nitrogen-Vacancy Microscopy