Moon, Kyoung-Woong Kim, Duck-Ho Yoo, Sang-Cheol Cho, Cheong-Gu Hwang, Sungmin Kahng, Byungnam Min, Byoung-Chul Shin, Kyung-Ho Choe, Sug-Bong 2024-01-20T13:00:25Z 2024-01-20T13:00:25Z 2021-09-01 2013-03 0031-9007 https://pubs.kist.re.kr/handle/201004/128290 We demonstrate here that the current-driven domain wall (DW) in two dimensions forms a "facet" roughness, distinctive to the conventional self-affine roughness induced by a magnetic field. Despite the different universality classes of these roughnesses, both the current-and field-driven DW speed follow the same creep law only with opposite angular dependences. Such angular dependences result in a stable facet angle, from which a single DW image can unambiguously quantify the spin-transfer torque efficiency, an essential parameter in DW-mediated nanodevices. DOI: 10.1103/PhysRevLett.110.107203 English AMER PHYSICAL SOC Distinct Universality Classes of Domain Wall Roughness in Two-Dimensional Pt/Co/Pt Films Article 10.1103/PhysRevLett.110.107203 1 PHYSICAL REVIEW LETTERS, v.110, no.10 PHYSICAL REVIEW LETTERS 110 10 scie scopus 000315898400005 2-s2.0-84874823316 Physics, Multidisciplinary Physics Article RANDOM IMPURITIES DISORDERED MEDIA MOTION INTERFACES CREEP