Abstract
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.
| Original language | English |
|---|---|
| Article number | 144406 |
| Journal | Physical Review B |
| Volume | 98 |
| Issue number | 14 |
| DOIs | |
| Publication status | Published - 2018 Oct 5 |
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ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
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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.
In: Physical Review B, Vol. 98, No. 14, 144406, 05.10.2018.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Enhancement of two-magnon scattering induced by a randomly distributed antiferromagnetic exchange field
AU - Sakimura, Hiroto
AU - Asami, Akio
AU - Harumoto, Takashi
AU - Nakamura, Yoshio
AU - Shi, Ji
AU - Ando, Kazuya
PY - 2018/10/5
Y1 - 2018/10/5
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.98.144406
DO - 10.1103/PhysRevB.98.144406
M3 - Article
VL - 98
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 2469-9950
IS - 14
M1 - 144406
ER -