The magnetic exchange interaction is the one of the key factors governing the basic characteristics of magnetic systems. Unlike the symmetric nature of the Heisenberg exchange interaction, the interfacial Dzyaloshinskii-Moriya interaction (DMI) generates an antisymmetric exchange interaction which offers challenging opportunities in spintronics with intriguing antisymmetric phenomena. The role of the DMI, however, is still being debated, largely because distinct strengths of DMI have been measured for different magnetic objects, particularly chiral magnetic domain walls (DWs) and non-reciprocal spin waves (SWs). In this paper, we show that, after careful data analysis, both the DWs and SWs experience the same strength of DMI. This was confirmed by spin-torque efficiency measurement for the DWs, and Brillouin light scattering measurement for the SWs. This observation, therefore, indicates the unique role of the DMI on the magnetic DW and SW dynamics and also guarantees the compatibility of several DMI-measurement schemes recently proposed.
@article{arxiv.1810.04375,
title = {Quantitative agreement of Dzyaloshinskii-Moriya interactions for domain-wall motion and spin-wave propagation},
author = {Dae-Yun Kim and Nam-Hui Kim and Yong-Keun Park and Min-Ho Park and Joo-Sung Kim and Yune-Seok Nam and Jinyong Jung and Jaehun Cho and Duck-Ho Kim and June-Seo Kim and Byoung-Chul Min and Sug-Bong Choe and Chun-Yeol You},
journal= {arXiv preprint arXiv:1810.04375},
year = {2019}
}