Dzyaloshinskii-Moriya Interaction across an Antiferromagnet-Ferromagnet Interface

Xin Ma, Guoqiang Yu, Seyed A. Razavi, Stephen S. Sasaki, Xiang Li, Kai Hao, Sarah H. Tolbert, Kang L. Wang, Xiaoqin Li

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)

Abstract

The antiferromagnet- (AFM-)ferromagnet (FM) interfaces are of central importance in recently developed pure electric or ultrafast control of FM spins, where the underlying mechanisms remain unresolved. Here we report the direct observation of an Dzyaloshinskii-Moriya interaction (DMI) across the AFM-FM interface of IrMn/CoFeB thin films. The interfacial DMI is quantitatively measured from the asymmetric spin-wave dispersion in the FM layer using Brillouin light scattering. The DMI strength is enhanced by a factor of 7 with increasing IrMn layer thickness in the range of 1-7.5 nm. Our findings provide deeper insight into the coupling at the AFM-FM interface and may stimulate new device concepts utilizing chiral spin textures such as magnetic Skyrmions in AFM-FM heterostructures.

Original languageEnglish
Article number027202
JournalPhysical review letters
Volume119
Issue number2
DOIs
Publication statusPublished - 2017 Jul 14

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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