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http://dx.doi.org/10.4283/JKMS.2015.25.1.001

Optical measurement and analysis technique for spin-orbit torques  

Yun, Sang-Jun (Department of Physics and Astronomy, Seoul National University)
Moon, Joon (Department of Physics and Astronomy, Seoul National University)
Whang, Hyun-Seok (Department of Physics and Astronomy, Seoul National University)
Choe, Sug-Bong (Department of Physics and Astronomy, Seoul National University)
Publication Information
Journal of the Korean Magnetics Society / v.25, no.1, 2015 , pp. 1-3 More about this Journal
Abstract
We demonstrate here an optical measurement technique to quantify the spin-orbit torques. The magnetization dynamics induced by the spin-orbit torques with a sinusoidal current injection is measured by use of polar magneto-optical Kerr effect. The measured signal is then analyzed based on the Landau-Lifhshitz-Gilbert equation with consideration of the spin-orbit torques. The present measurement technique is applied to Pd/Co/Pt films and then, the longitudinal and transverse components of the spin-orbit torques are successfully quantified. The present optical technique provides an alternative way to quantify the spin-orbit torques.
Keywords
spin-orbit torque; optical measurement; magneto-optical Kerr effect;
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