Spin pumping blocked by single-layer graphene

Satoshi Haku, Takaharu Tashiro, Hiroyasu Nakayama, Jun'Ichi Ieda, Shiro Entani, Seiji Sakai, Kazuya Ando

Research output: Contribution to journalArticle

Abstract

We demonstrate that spin pumping in a Ni<inf>81</inf>Fe<inf>19</inf>/Pt bilayer is strongly suppressed by inserting single-layer graphene (SLG) at the interface. Spin pumping in the Ni81Fe19/Pt bilayer enhances the magnetization damping of the ferromagnetic layer, which is quantified from the microwave frequency dependence of the ferromagnetic resonance linewidth. We show that the enhancement of the magnetization damping due to spin pumping disappears in a Ni<inf>81</inf>Fe<inf>19</inf>/SLG/Pt trilayer. This result indicates that spin pumping is blocked by the atomic monolayer, illustrating the crucial role of interfacial short-range spin-exchange coupling in spin pumping in metallic systems.

Original languageEnglish
Article number073009
JournalApplied Physics Express
Volume8
Issue number7
DOIs
Publication statusPublished - 2015 Jul 1

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ASJC Scopus subject areas

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

Cite this

Haku, S., Tashiro, T., Nakayama, H., Ieda, JI., Entani, S., Sakai, S., & Ando, K. (2015). Spin pumping blocked by single-layer graphene. Applied Physics Express, 8(7), [073009]. https://doi.org/10.7567/APEX.8.073009