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Current-driven magnetic domain wall motion and its real-time detection
Kim, Kab-Jin,Yoshimura, Yoko,Ono, Teruo Institute of Pure and Applied Physics 2017 Japanese Journal of Applied Physics Vol. No.
<P>Current-controlled magnetic domain wall motion has opened the possibility of a novel type of shift register memory device, which has been optimistically predicted to replace existing magnetic memories. Owing to this promising prospect, intensive work has been carried out during the last few decades. In this article, we first review the progress in the study of current-induced magnetic domain wall motion. Underlying mechanisms behind the domain wall motion, which have been discovered during last few decades, as well as technological achievements are presented. We then present our recent experimental results on the real-time detection of current-driven multiple magnetic domain wall motion, which directly demonstrates the operation of a magnetic domain wall shift register. (C) 2017 The Japan Society of Applied Physics</P>
Current-Induced Control of Spin-Wave Attenuation
Seo, Soo-Man,Lee, Kyung-Jin,Yang, Hyunsoo,Ono, Teruo American Physical Society 2009 Physical review letters Vol.102 No.14
<P>The current-induced modification of the attenuation of a propagating spin wave in a magnetic nanowire is studied theoretically and numerically. The attenuation length of spin wave can increase when the spin waves and electrons move in the same direction. It is directly affected by the nonadiabaticity of the spin-transfer torque and thus can be used to estimate the nonadiabaticity. When the nonadiabatic spin torque is sufficiently large, the attenuation length becomes negative, resulting in the amplification of spin waves.</P>