Interfacial control of Dzyaloshinskii-Moriya interaction in heavy metal/ferromagnetic metal thin film heterostructures

Xin Ma, Guoqiang Yu, Xiang Li, Tao Wang, Di Wu, Kevin S. Olsson, Zhaodong Chu, Kyongmo An, John Q. Xiao, Kang L. Wang, Xiaoqin Li

Research output: Contribution to journalArticlepeer-review

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 3 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.

Original languageEnglish
Article number180408
JournalPhysical Review B
Volume94
Issue number18
DOIs
Publication statusPublished - 2016 Nov 28

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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