Session Q8: Magnonics: Spin Wave Processes in Magnetic Materials
11:15 AM–2:15 PM, Wednesday, March 17, 2010
Room: Portland Ballroom 255
Sponsoring Unit:
GMAG
Chair: Olle Heinonen, Seagate Technology
Abstract ID: BAPS.2010.MAR.Q8.4
Abstract: Q8.00004 : Modification of Spin Wave Propagation by Current Injection
1:03 PM–1:39 PM
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Abstract 
Author:
Teruo Ono
(Kyoto University)
We studied the effect of an electric current on the spin wave propagation in magnetic wires, and found the following two effects. (i) Current injection changes the velocity of spin wave; the velocity is increased or decreased depending on the current polarity. (ii) Current injection modifies the attenuation length of spin wave; the attenuation length of spin wave can increase when the spin waves and electrons move in the same direction. The first finding can be interpreted as the time-domain observation of the spin-wave Doppler shift by current injection [1]. The second effect is thought to be affected by the nonadiabaticity of the spin transfer torque and thus can be used to estimate the nonadiabaticity [2]. \\[4pt] [1] V. Vlaminck and M. Bailleul, Science 322, (2008) 410. \\[0pt] [2] S. M. Seo, K. J. Lee, H. Yang, and T. Ono, Phys. Rev. Lett. 102, (2009) 147202.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2010.MAR.Q8.4