Comparison between spin-orbit torques measured by domain-wall motions and harmonic measurements
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- Joo-Sung Kim
- Department of Physics and Institute of Applied Physics, Seoul National University 1 , Seoul 08826, Republic of Korea
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- Yune-Seok Nam
- Department of Physics and Institute of Applied Physics, Seoul National University 1 , Seoul 08826, Republic of Korea
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- Dae-Yun Kim
- Department of Physics and Institute of Applied Physics, Seoul National University 1 , Seoul 08826, Republic of Korea
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- Yong-Keun Park
- Department of Physics and Institute of Applied Physics, Seoul National University 1 , Seoul 08826, Republic of Korea
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- Min-Ho Park
- Department of Physics and Institute of Applied Physics, Seoul National University 1 , Seoul 08826, Republic of Korea
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- Sug-Bong Choe
- Department of Physics and Institute of Applied Physics, Seoul National University 1 , Seoul 08826, Republic of Korea
抄録
<jats:p>Here we report the comparison of the spin torque efficiencies measured by three different experimental schemes for Pt/Co/X stacks with material X (= Pt, Ta, Ti, Al, Au, Pd, and Ru. 7 materials). The first two spin torque efficiencies εDW(1) and εDW(2) are quantified by the measurement of spin-torque-induced effective field for domain-wall depinning and creeping motions, respectively. The last one—longitudinal spin torque efficiency εL—is measured by harmonic signal measurement of the magnetization rotation with uniform magnetization configuration. The results confirm that, for all measured Pt/Co/X stacks, εDW(1) and εDW(2) are exactly consistent to each other and these two efficiencies are roughly proportional to εL with proportionality constant π/2, which comes from the integration over the domain-wall configuration.</jats:p>
収録刊行物
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- AIP Advances
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AIP Advances 8 (5), 2017-12-12
AIP Publishing