Interfacial Control of Dzyaloshinskii--Moriya Interaction in Heavy Metal/Ferromagnetic Metal Thin Film Heterostructures

ORAL

Abstract

The interfacial Dzyaloshinskii--Moriya Interaction (DMI) in ultrathin magnetic thin film heterostructures provides a new approach for controlling spin textures on mesoscopic length scales. Here we investigate the dependence of the interfacial DMI constant $D$ on a Pt wedge insertion layer in Ta/CoFeB/Pt(wedge)/MgO thin films by observing the asymmetric spin wave dispersion using Brillouin light scattering. Continuous tuning of $D$ by more than a factor of three is realized by inserting less than one monolayer of Pt. The observations provide new insights for designing magnetic thin film heterostructures with tailored $D$ for controlling skyrmions and magnetic domain wall chirality and dynamics.

*The work at UT-Austin and UCLA are supported by SHINES, an Energy Frontier Research Center funded by the U.S. DoE, Office of Science, Basic Energy Science (BES) under award \# DE-SC0012670.

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Authors

  • Xin Ma

    • The University of Texas at Austin

  • Guoqiang Yu

    • University of California

  • Xiang Li

    • University of California

  • Tao Wang

    • University of Delaware

  • Di Wu

    • University of California

  • Kevin Olsson

    • The University of Texas at Austin

  • Zhaodong Chu

    • The University of Texas at Austin

  • Kyongmo An

    • The University of Texas at Austin

  • John Xiao

    • University of Delaware

  • Kang Wang

    • University of California

  • Xiaoqin Li

    • The University of Texas at Austin