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Interfacial potential gradient modulates Dzyaloshinskii-Moriya interaction in Pt/Co/metal multilayers

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  • Additional Information
    • Contributors:
      THALES France; Micro et NanoMagnétisme (NEEL - MNM); Institut Néel (NEEL); Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP); Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP); Université Grenoble Alpes (UGA); Laboratoire de Physique des Solides - IDMAG (LPS); Laboratoire de Physique des Solides (LPS); Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS); Laboratoire Albert Fert (ex-UMPhy Unité mixte de physique CNRS/Thales); THALES France -Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS); ANR-10-LABX-0051,LANEF,Laboratory of Alliances on Nanosciences - Energy for the Future(2010); ANR-15-GRFL-0005,SOgraph,Tailoring Spin-Orbit effects in Graphene for spin-orbitronic applications(2015); ANR-17-CE24-0025,TOPSKY,Propriétés topologiques des skyrmions magnétiques et opportunitiés pour le dévelopement de nouveaux dispositifs spintroniques(2017); European Project: 824123,H2020-FETPROACT-2018-2020,H2020-FETPROACT-2018-01,SKYTOP(2018)
    • Publication Information:
      CCSD
      American Physical Society
    • Publication Date:
      2022
    • Collection:
      Université Grenoble Alpes: HAL
    • Abstract:
      International audience ; The actual mechanisms occurring at interfaces underlying the Dzyaloshinskii-Moriya interaction (DMI) remain a question in nanomagnetism. In this study, we investigate the origin of the interfacial DMI, aiming at estimating how independent the DMI contributions of the two interfaces of a FM layer are and what their relative weight in the effective DMI amplitude is. To this aim, we explore the correlation between the effective interfacial DMI and the metal properties, namely, atomic number, electronegativity, and the work function of the metal M. A clear linear relationship is found between the interfacial DMI and the work function difference at the Co/M interface. This result is strong evidence of the independent DMI contributions of the two interfaces for the chosen Co thickness(1 nm). It also suggests that the Co/Cu interface bears no interfacial DMI. These findings can guide the optimization of the magnetic properties of future devices.
    • Relation:
      info:eu-repo/grantAgreement//824123/EU/Skyrmion-Topological insulator and Weyl semimetal technology/SKYTOP
    • Accession Number:
      10.1103/PhysRevMaterials.6.L071401
    • Online Access:
      https://hal.science/hal-03838957
      https://hal.science/hal-03838957v1/document
      https://hal.science/hal-03838957v1/file/AjejasPhysRevMaterials.6.L071401.pdf
      https://doi.org/10.1103/PhysRevMaterials.6.L071401
    • Rights:
      info:eu-repo/semantics/OpenAccess
    • Accession Number:
      edsbas.9FA92FDC