Symmetry-breaking interlayer Dzyaloshinskii–Moriya interactions in synthetic antiferromagnets

Research output: Contribution to journalLetterScientificpeer-review

Researchers

  • Amalio Fernández-Pacheco
  • Elena Vedmedenko
  • Fanny Ummelen
  • Rhodri Mansell

  • Dorothée Petit
  • Russell P. Cowburn

Research units

  • University of Glasgow
  • University of Cambridge
  • University of Hamburg
  • Eindhoven University of Technology

Abstract

The magnetic interfacial Dzyaloshinskii–Moriya interaction (DMI) in multilayered thin films can lead to chiral spin states, which are of paramount importance for future spintronic technologies1,2. Interfacial DMI typically manifests as an intralayer interaction, mediated via a paramagnetic heavy metal in systems lacking inversion symmetry3. Here we show that, by designing synthetic antiferromagnets with canted magnetization states4,5, it is also possible to observe direct evidence of the interfacial interlayer DMI at room temperature. The interlayer DMI breaks the symmetry of the magnetic reversal process via the emergence of non-collinear spin states, which results in chiral exchange-biased hysteresis loops. The spin chiral interlayer interactions reported here are expected to manifest in a range of multilayered thin-film systems, opening up as yet unexplored avenues for the development and exploitation of chiral effects in magnetic heterostructures6–8.

Details

Original languageEnglish
Pages (from-to)679-684
Number of pages6
JournalNature Materials
Volume18
Issue number7
Publication statusPublished - 1 Jul 2019
MoE publication typeA1 Journal article-refereed

ID: 35173263