Spin absorption at a ferromagnetic-metal/platinum-oxide interface

Akio Asami, Hongyu An, Akira Musha, Tenghua Gao, Makoto Kuroda, Kazuya Ando

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We investigate the absorption of a spin current at a ferromagnetic-metal/Pt-oxide interface by measuring ferromagnetic resonance. The spin absorption was characterized by the magnetic damping of the heterostructure. We show that the magnetic damping of a Ni81Fe19 film is clearly enhanced by attaching Pt oxide on the Ni81Fe19 film. The damping enhancement disappears by inserting an ultrathin Cu layer between the Ni81Fe19 and Pt-oxide layers. These results demonstrate an essential role of the direct contact between the Ni81Fe19 and Pt oxide to induce sizable interface spin-orbit coupling. Furthermore, the spin-absorption parameter of the Ni81Fe19/Pt-oxide interface is comparable to that of intensively studied heterostructures with strong spin-orbit coupling, such as an oxide interface, topological insulators, and metallic junctions with Rashba spin-orbit coupling. This result illustrates strong spin-orbit coupling at the ferromagnetic-metal/Pt-oxide interface, providing an important piece of information for quantitative understanding of the spin absorption and spin-charge conversion at the ferromagnetic-metal/metallic-oxide interface.

Original languageEnglish
Article number024432
JournalPhysical Review B
Volume99
Issue number2
DOIs
Publication statusPublished - 2019 Jan 25

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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