Kim, Dae-Yun Berrai, Imane Suraj, T. S. Roussigne, Yves Yang, Shuhan Belmeguenai, Mohamed Hu, Fanrui Shi, Guoyi Tan, Hui Ru Huang, Jifei Soumyanarayanan, Anjan Kim, Kyoung-Whan Cherif, Salim Mourad Yang, Hyunsoo 2024-11-07T01:30:43Z 2024-11-07T01:30:43Z 2024-11-06 2024-10 0031-9007 https://pubs.kist.re.kr/handle/201004/150982 Chiral magnets have garnered significant interest due to the emergence of unique phenomena prohibited in inversion-symmetric magnets. While the equilibrium characteristics of chiral magnets have been extensively explored through the Dzyaloshinskii-Moriya interaction (DMI), nonequilibrium properties like magnetic damping have received comparatively less attention. We present the inaugural direct observation of chiral damping through Brillouin light scattering (BLS) spectroscopy. Employing BLS spectrum analysis, we independently deduce both the DMI and chiral damping, extracting them from the frequency shift and linewidth of the spectrum peak, respectively. The resulting linewidths exhibit clear odd symmetry with respect to the magnon wave vector, unambiguously confirming the presence of chiral damping. Our study introduces a novel methodology for quantifying chiral damping, with potential ramifications on diverse nonequilibrium phenomena within chiral magnets. English American Physical Society Chiral Damping of Magnons Article 10.1103/PhysRevLett.133.156704 1 Physical Review Letters, v.133, no.15 Physical Review Letters 133 15 N scie scopus 001335504900007 2-s2.0-85206634759 Physics, Multidisciplinary Physics Article DZYALOSHINSKII-MORIYA INTERACTION DOMAIN-WALLS SPIN-TORQUE DYNAMICS