TITLE

Modulation of propagation characteristics of spin waves induced by perpendicular electric currents

AUTHOR(S)
Xing, X. J.; Yu, Y. P.; Li, S. W.
PUB. DATE
October 2009
SOURCE
Applied Physics Letters;10/5/2009, Vol. 95 Issue 14, p142508
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We have theoretically and numerically investigated the effect of perpendicular currents on the propagation characteristics of spin waves on a wire composing the free layer of a spin valve. Our theory shows that the single Slonczewski’s spin-transfer torque can cause the spin-wave Doppler effect and modify the spin-wave attenuation and that the fieldlike torque makes negligible contribution due to its relatively small magnitude. Micromagnetic simulations confirm these theoretical predictions and further reveal that spin waves at suprathreshold currents are instable and become chaotic with increased time. Finally, selective tuning of the spin-wave attenuation is demonstrated by using local, individual currents.
ACCESSION #
44539677

 

Related Articles

  • Spin Hall effect-driven spin torque in magnetic textures. Manchon, A.; Lee, K.-J. // Applied Physics Letters;7/11/2011, Vol. 99 Issue 2, p022504 

    Current-induced spin torque and magnetization dynamics in the presence of spin Hall effect in magnetic textures is studied theoretically. The local deviation of the charge current gives rise to a current-induced spin torque of the form (1-βM)×[(u0+αHu0×M)·∇]M, where u0 is...

  • Reduced spin transfer torque switching current density with non-collinear polarizer layer magnetization in magnetic multilayer systems. You, Chun-Yeol // Applied Physics Letters;6/18/2012, Vol. 100 Issue 25, p252413 

    Through micromagnetic simulations, it was found that the spin transfer torque (STT) switching current density is reduced with non-collinear polarizer layer magnetization. The dependence of the switching current density on the polarizer layer magnetization angle was investigated, and a typical...

  • Current induced domain wall dynamics in the presence of spin orbit torques. Boulle, O.; Buda-Prejbeanu, L. D.; Jué, E.; Miron, I. M.; Gaudin, G. // Journal of Applied Physics;2014, Vol. 115 Issue 17, p17D502-1 

    Current induced domain wall (DW) motion in perpendicularly magnetized nanostripes in the presence of spin orbit torques is studied. We show using micromagnetic simulations that the direction of the current induced DW motion and the associated DW velocity depend on the relative values of the...

  • Magnetization reversal by spin-transfer torque in 90° configuration with a perpendicular spin polarizer. Seki, T.; Mitani, S.; Yakushiji, K.; Takanashi, K. // Applied Physics Letters;10/23/2006, Vol. 89 Issue 17, p172504 

    The effect of spin-transfer torque in 90° magnetization configuration on current-induced magnetization reversal was studied in current-perpendicular-to-plane giant magnetoresistance pillars of in-plane magnetized FePt/Au/FePt trilayers combined with an L10-FePt perpendicular spin polarizer....

  • Circular domain wall motion driven by spin-polarized currents in confined square nanomagnets. Haiwen Xi; Kai-Zhong Gao; Yiming Shi // Journal of Applied Physics;2/15/2005, Vol. 97 Issue 4, p044306 

    The spin-transfer torque effect on the magnetization in a pillar structure has been investigated using micromagnetic simulation. The study shows that a spin-polarized dc current induces a domain wall formation from the initial inhomogeneous magnetization configuration of the square magnet and...

  • Classical Mechanical Analogies in Wide Dirty SFS Junctions. Baker, Thomas; Icreverzi, Ovidiu; Richie-Halford, Adam; Bill, Andreas // Journal of Superconductivity & Novel Magnetism;Oct2012, Vol. 25 Issue 7, p2183 

    The Usadel equation in a bulk superconductor and a ferromagnet is noticed to be mathematically similar to the equation of motion of a pendulum. A solution technique developed to solve the classic pendulum is applied to analytically determine the order parameter of the singlet state in a...

  • Reduction of switching current density in perpendicular magnetic tunnel junctions by tuning the anisotropy of the CoFeB free layer. Rahman, M. T.; Lyle, A.; Khalili Amiri, P.; Harms, J.; Glass, B.; Zhao, H.; Rowlands, G.; Katine, J. A.; Langer, J.; Krivorotov, I. N.; Wang, K. L.; Wang, J. P. // Journal of Applied Physics;Apr2012, Vol. 111 Issue 7, p07C907 

    The spin torque switching behavior of perpendicular magnetic tunnel junctions consisting of a CoFeB free layer and a CoFeB/Ru/(Co/Pd)n exchanged coupled fixed layer is investigated. At first, the Ru and CoFeB layer thickness is tuned in the CoFeB/Ru/(Co/Pd)n structure to form a ferromagnetically...

  • Direct evidence for a half-metallic ferromagnet. Park, J.-H.; Vescovo, E.; Kim, H.-J.; Kwon, C.; Ramesh, R.; Venkatesan, T. // Nature;4/23/1998, Vol. 392 Issue 6678, p794 

    Presents research which reported spin-resolved photoemission measurements of the half-metallic material, a ferro-magnetic manganese perovskite. Traits of half-metallic materials; Electronic density of states; Conductivity; Manifestations of half-metallic nature; Aspects of minority and majority...

  • Sizing of Electrical Motors for Gearless and Directly Stimulating Applications. Tarımer, İ.; Gurbuz, R. // Electronics & Electrical Engineering;2008, Issue 84, p21 

    The article examines the effect of using brushed and brushless direct current (DC) and SR motors with high torque in mechanical systems without reductor. The use of electrical motors with gears in house utensils are essential in terms of the nature of the work. In kitchen application, the...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics