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 CrI3 and Cr2Ge2Te6 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, CrCl3. Our experiment is the first direct observation of standing spin-wave modes, set up across a thickness of 20 μm, 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.
@article{arxiv.2001.05981,
title = {Evidence of standing spin-waves in a van der Waals magnetic material},
author = {Lucky N. Kapoor and Supriya Mandal and Meghan Patankar and Soham Manni and A. Thamizhavel and Mandar M. Deshmukh},
journal= {arXiv preprint arXiv:2001.05981},
year = {2020}
}