Enhancement of spin-charge current interconversion by oxidation of rhenium

Shutaro Karube, Daichi Sugawara, Chao Tang, Tadao Tanabe, Yutaka Oyama, Junsaku Nitta

Research output: Contribution to journalArticle

Abstract

We have demonstrated enhancement of the spin-charge current interconversion by oxidation of rhenium (Re). Although amorphous rhenium oxide (ReOX) is electrically conductive, the spin–orbit torque efficiency measured by spin-torque ferromagnetic resonance is 0.074, and 37 times larger than the pure Re case whose amplitude is 0.002. Furthermore, we have also found that the values of the damping-like and field-like torque efficiencies are 0.030 and −0.052, respectively. These values are comparable with those for conventional spin–orbit materials such as Pt or Ta, suggesting that ReOX is a candidate material for spintronics devices. THz-time domain spectroscopy was performed to confirm the inverse spin-charge current conversion process in ReOX.

Original languageEnglish
Article number167298
JournalJournal of Magnetism and Magnetic Materials
Volume516
DOIs
Publication statusPublished - 2020 Dec 15

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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