Skyrmions in magnetic multilayers: Chirality, electrical detection and current-induced motion

Nicolas Reyren, Karim Bouzehouane, Jean Yves Chauleau, Sophie Collin, Albert Fert, Simone Finizio, Karin Garcia, Sean Hughes, Nicolas Jaouen, William Legrand, Davide Maccariello, Samuel McFadzean, Stephen McVitie, Christoforos Moutafis, Horia Popescu, Jörg Raabe, C. A.F. Vaz, Vincent Cros

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Sub-100-nm skyrmions are stabilized in magnetic metallic multilayers and observed using transmission electron microscopy, magnetic force microscopy, scanning transmission X-ray microscopy and X-ray resonant magnetic scattering. All these advanced imaging techniques demonstrate the presence of 'pure' Neel skyrmion textures with a determined chirality. Combining these observations with electrical measurements allows us to demonstrate reproducible skyrmion nucleation using current pulses, and measure their contribution to the transverse resistivity to detect them electrically. Once nucleated, skyrmions can be moved using charge currents. We find predominantly a creep-like regime, characterized by disordered skyrmion motion, as observed by atomic force microscopy and scanning transmission X-ray microscopy. These observations are explained qualitatively and to some extent quantitatively by the presence of crystalline grains of about 20nm lateral size with a distribution of magnetic properties.

Original languageEnglish
Title of host publicationSpintronics X
EditorsHenri Jaffres, Manijeh Razeghi, Henri-Jean Drouhin, Jean-Eric Wegrowe
PublisherSPIE
Volume10357
ISBN (Electronic)9781510611719
DOIs
Publication statusPublished - 1 Jan 2017
EventSpintronics X Symposium - San Diego, United States
Duration: 6 Aug 201710 Aug 2017

Conference

ConferenceSpintronics X Symposium
Country/TerritoryUnited States
CitySan Diego
Period6/08/1710/08/17

Keywords

  • domain wall
  • metal
  • MFM
  • multilayer
  • nucleation
  • Néel
  • skyrmion
  • spin torque
  • STXM
  • XRMS

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