Spin-torque ferromagnetic resonance in electrochemically etched metallic device

Ryuki Suzuki, Satoshi Haku, Hiroki Hayashi, Kazuya Ando

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


We demonstrate the quantification of spin-orbit torque efficiencies using spin-torque ferromagnetic resonance (ST-FMR) combined with electrochemical etching of a Fe/Pt bilayer. The electrochemical etching of the ST-FMR device using an ionic liquid enables to study spin-orbit effective fields, as well as an Oersted field, by varying the ferromagnetic-layer thickness. This allows to disentangle the field-like (FL) effective field and Oersted field, enabling to determine the damping-like and FL torque efficiencies in the single device. This robust technique opens a possibility to explore the spin-orbit torques in exotic materials and systems.

Original languageEnglish
Article number043007
JournalApplied Physics Express
Issue number4
Publication statusPublished - 2020 Apr 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


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