Kim, Dae-Yun Park, Min-Ho Park, Yong-Keun Kim, Joo-Sung Nam, Yoon-Seok Hwang, Hyun-Seok Kim, Duck-Ho Je, Soong-Geun Min, Byoung-Chul Choe, Sug-Bong 2024-01-19T23:02:41Z 2024-01-19T23:02:41Z 2021-09-03 2018-04 2469-9950 https://pubs.kist.re.kr/handle/201004/121528 Broken symmetries in diverse systems generate a number of intriguing phenomena and the analysis on such broken symmetries often provides decisive clues for exploring underlying physics in the systems. Recently, in magnetic thin-film systems, the Dzyaloshinskii-Moriya interaction (DMI)-induced by the broken symmetry of structural inversion-accounts for various chiral phenomena, which are of timely issues in spintronics. Here, we report an experimental observation on unexpected tilting of magnetic domain walls (DWs) due to the broken symmetry under the application of the magnetic field transverse to the magnetic wire systems. It has been predicted that the DMI possibly causes such DW tilting in the direction of the energy minimization. However, very interestingly, experimental observation reveals that the DW tilting does not follow the prediction based on the energy minimization, even for the tilting direction. Instead, the DW tilting is governed by the DW speed asymmetry that is initiated by the DW pinning at wire edges. A simple analytic model is proposed in consideration of the DW speed asymmetry at wire edges, which successfully explains the experimental observation of the DW tilting directions and angles, as confirmed by numerical simulation. The present study manifests the decisive role of the DW pinning with the DW speed asymmetry, which determines the DW configuration and consequently, the dynamics. English AMER PHYSICAL SOC Magnetic domain-wall tilting due to domain-wall speed asymmetry Article 10.1103/PhysRevB.97.134407 1 Physical Review B, v.97, no.13 Physical Review B 97 13 scie scopus 000429454300005 2-s2.0-85045211540 Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Materials Science Physics Article WEAK FERROMAGNETISM CHIRAL MAGNET SUPERCONDUCTORS SKYRMIONS