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Updated: May 13, 2026

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions
Published on: February 22, 2018
Distinct universality classes of domain wall roughness in two-dimensional Pt/Co/Pt films
Kyoung-Woong Moon1, Duck-Ho Kim, Sang-Cheol Yoo
1CSO and Department of Physics, Seoul National University, Seoul 151-742, Republic of Korea.
Abstract:
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.
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