Enhancement of two-magnon scattering induced by a randomly distributed antiferromagnetic exchange field

Hiroto Sakimura, Akio Asami, Takashi Harumoto, Yoshio Nakamura, Ji Shi, Kazuya Ando

研究成果: Article

1 引用 (Scopus)

抄録

We report a quantitative study of two-magnon scattering in Ni81Fe19/NiO bilayers with various NiO thicknesses dNiO. We found that the magnetic damping of the Ni81Fe19/NiO bilayer strongly depends on dNiO, which evidences that the amplitude of the two-magnon scattering increases with increasing the thickness of the antiferromagnetic layer. The enhancement of the two-magnon scattering in the Ni81Fe19/NiO bilayer is attributed to the increase of randomly distributed antiferromagnetic exchange fields. We calculated the spin-mixing conductance by eliminating the effect of the two-magnon scattering, and found that the value is at 8.1nm-2 for the Ni81Fe19/NiO interface. Our result gives further insight on the role of the two-magnon scattering in manipulating magnetic damping, which is crucial for generation and transmission of spin currents in ferromagnet/antiferromagnet systems.

元の言語English
記事番号144406
ジャーナルPhysical Review B
98
発行部数14
DOI
出版物ステータスPublished - 2018 10 5

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Scattering
magnetic damping
augmentation
scattering
Damping

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

これを引用

Enhancement of two-magnon scattering induced by a randomly distributed antiferromagnetic exchange field. / Sakimura, Hiroto; Asami, Akio; Harumoto, Takashi; Nakamura, Yoshio; Shi, Ji; Ando, Kazuya.

:: Physical Review B, 巻 98, 番号 14, 144406, 05.10.2018.

研究成果: Article

Sakimura, Hiroto ; Asami, Akio ; Harumoto, Takashi ; Nakamura, Yoshio ; Shi, Ji ; Ando, Kazuya. / Enhancement of two-magnon scattering induced by a randomly distributed antiferromagnetic exchange field. :: Physical Review B. 2018 ; 巻 98, 番号 14.
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