title: Chiral damping of magnetic domain walls.
abstract: Structural symmetry breaking in magnetic materials is responsible for the existence of multiferroics, current-induced spin-orbit torques and some topological magnetic structures. In this Letter we report that the structural inversion asymmetry (SIA) gives rise to a chiral damping mechanism, which is evidenced by measuring the field-driven domain-wall (DW) motion in perpendicularly magnetized asymmetric Pt/Co/Pt trilayers. The DW dynamics associated with the chiral damping and those with Dzyaloshinskii-Moriya interaction (DMI) exhibit identical spatial symmetry. However, both scenarios are differentiated by their time reversal properties: whereas DMI is a conservative effect that can be modelled by an effective field, the chiral damping is purely dissipative and has no influence on the equilibrium magnetic texture. When the DW motion is modulated by an in-plane magnetic field, it reveals the structure of the internal fields experienced by the DWs, allowing one to distinguish the physical mechanism. The chiral damping enriches the spectrum of physical phenomena engendered by the SIA, and is essential for conceiving DW and skyrmion devices owing to its coexistence with DMI (ref. ).
authors.affiliation: University of Grenoble Alpes INAC-SPINTEC, F-38000 Grenoble, France.|CNRS INAC-SPINTEC, F-38000 Grenoble, France.|CEA INAC-SPINTEC, F-38000 Grenoble, France.
authors.forename: Emilie
authors.identifier: http://orcid.org/0000-0002-8815-6610
authors.initials: E
authors.lastname: Jué
authors.affiliation: University of Grenoble Alpes INAC-SPINTEC, F-38000 Grenoble, France.|CNRS INAC-SPINTEC, F-38000 Grenoble, France.|CEA INAC-SPINTEC, F-38000 Grenoble, France.
authors.forename: C K
authors.initials: CK
authors.lastname: Safeer
authors.affiliation: University of Grenoble Alpes INAC-SPINTEC, F-38000 Grenoble, France.|CNRS INAC-SPINTEC, F-38000 Grenoble, France.|CEA INAC-SPINTEC, F-38000 Grenoble, France.
authors.forename: Marc
authors.initials: M
authors.lastname: Drouard
authors.affiliation: University of Grenoble Alpes INAC-SPINTEC, F-38000 Grenoble, France.|CNRS INAC-SPINTEC, F-38000 Grenoble, France.|CEA INAC-SPINTEC, F-38000 Grenoble, France.
authors.forename: Alexandre
authors.initials: A
authors.lastname: Lopez
authors.affiliation: University of Grenoble Alpes INAC-SPINTEC, F-38000 Grenoble, France.|CNRS INAC-SPINTEC, F-38000 Grenoble, France.|CEA INAC-SPINTEC, F-38000 Grenoble, France.
authors.forename: Paul
authors.initials: P
authors.lastname: Balint
authors.affiliation: University of Grenoble Alpes INAC-SPINTEC, F-38000 Grenoble, France.|CNRS INAC-SPINTEC, F-38000 Grenoble, France.|CEA INAC-SPINTEC, F-38000 Grenoble, France.
authors.forename: Liliana
authors.initials: L
authors.lastname: Buda-Prejbeanu
authors.affiliation: University of Grenoble Alpes INAC-SPINTEC, F-38000 Grenoble, France.|CNRS INAC-SPINTEC, F-38000 Grenoble, France.|CEA INAC-SPINTEC, F-38000 Grenoble, France.
authors.forename: Olivier
authors.initials: O
authors.lastname: Boulle
authors.affiliation: University of Grenoble Alpes INAC-SPINTEC, F-38000 Grenoble, France.|CNRS INAC-SPINTEC, F-38000 Grenoble, France.|CEA INAC-SPINTEC, F-38000 Grenoble, France.
authors.forename: Stephane
authors.initials: S
authors.lastname: Auffret
authors.affiliation: CNRS Institut Néel, F-38042 Grenoble, France.
authors.forename: Alain
authors.initials: A
authors.lastname: Schuhl
authors.affiliation: King Abdullah University of Science and Technology (KAUST), Physical Science and Engineering Division, Thuwal 23955-6900, Saudi Arabia.
authors.forename: Aurelien
authors.identifier: http://orcid.org/0000-0002-4768-293X
authors.initials: A
authors.lastname: Manchon
authors.affiliation: University of Grenoble Alpes INAC-SPINTEC, F-38000 Grenoble, France.|CNRS INAC-SPINTEC, F-38000 Grenoble, France.|CEA INAC-SPINTEC, F-38000 Grenoble, France.
authors.forename: Ioan Mihai
authors.initials: IM
authors.lastname: Miron
authors.affiliation: University of Grenoble Alpes INAC-SPINTEC, F-38000 Grenoble, France.|CNRS INAC-SPINTEC, F-38000 Grenoble, France.|CEA INAC-SPINTEC, F-38000 Grenoble, France.
authors.forename: Gilles
authors.initials: G
authors.lastname: Gaudin
mesh_terms: D060328:Magnetic Phenomena; D008956:Models, Chemical; D015394:Molecular Structure