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Proceedings Paper

Chiral damping in magnetic domain-walls (Conference Presentation)
Author(s): Emilie Jue; C.K. Safeer; Marc Drouard; Alexandre Lopez; Paul Balint; Liliana Buda-Prejbeanu; Olivier Boulle; Stéphane Auffret; Alain Schuhl; Aurélien Manchon; Ioan Mihai Miron; Gilles Gaudin
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Paper Abstract

The Dzyaloshinskii-Moriya interaction is responsible for chiral magnetic textures (skyrmions, spin spiral structures, …) in systems with structural inversion asymmetry and high spin-orbit coupling. It has been shown that the domain wall (DW) dynamics in such materials can be explained by chiral DWs with (partly or fully) Néel structure, whose stability derives from an interfacial DMI [1]. In this work, we show that DMI is not the only effect inducing chiral dynamics and demonstrate the existence of a chiral damping [2]. This result is supported by the study of the asymmetry induced by an in-plane magnetic field on field induced domain wall motion in perpendicularly magnetized asymmetric Pt/Co/Pt trilayers. Whereas the asymmetry of the DW motion is consistent with the spatial symmetries expected with the DMI, we show that this asymmetry cannot be attributed to an effective field but originates from a purely dissipative mechanism. The observation of chiral damping, not only enriches the spectrum of physical phenomena engendered by the SIA, but since it can coexist with DMI it is essential for conceiving DW and skyrmion devices. [1] A. Thiaville, et al., EPL 100, 57002 (2012) [2] E. Jué, et al., Nat. Mater., in press (doi: 10.1038/nmat4518)

Paper Details

Date Published: 4 November 2016
PDF: 1 pages
Proc. SPIE 9931, Spintronics IX, 993130 (4 November 2016); doi: 10.1117/12.2239050
Show Author Affiliations
Emilie Jue, SPINTEC (France)
National Institute of Standards and Technology (United States)
C.K. Safeer, SPINTEC (France)
Marc Drouard, SPINTEC (France)
Alexandre Lopez, SPINTEC (France)
Paul Balint, SPINTEC (France)
Liliana Buda-Prejbeanu, SPINTEC (France)
Olivier Boulle, SPINTEC (France)
Stéphane Auffret, SPINTEC (France)
Alain Schuhl, Institut NÉEL (France)
Aurélien Manchon, King Abdullah Univ. of Science and Technology (Saudi Arabia)
Ioan Mihai Miron, SPINTEC (France)
Gilles Gaudin, SPINTEC (France)

Published in SPIE Proceedings Vol. 9931:
Spintronics IX
Henri-Jean Drouhin; Jean-Eric Wegrowe; Manijeh Razeghi, Editor(s)

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