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Dynamic control of spin wave spectra using spin-polarzied currents
WANG Qi 1,ZHANG Huaiwu 1,TANG Xiaoli 1,Hans Fangohr 2,BAI Feiming 1,ZHONG Zhiyong 1 * #
1.State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054
2.Faculty of Engineering and the Environment ,University of southampton, SO17 1BJ, United Kingdom
*Correspondence author
#Submitted by
Funding: Research Fund for the Doctoral Program of Higher Education(No.No 20120185110029)
Opened online:24 September 2014
Accepted by: none
Citation: WANG Qi,ZHANG Huaiwu,TANG Xiaoli.Dynamic control of spin wave spectra using spin-polarzied currents[OL]. [24 September 2014] http://en.paper.edu.cn/en_releasepaper/content/4610304
We describe a method of controlling the spin wave spectra dynamically in a uniform nanostripe waveguide through spin-polarized currents. A stable periodic magnetization structure is observed when the current flows vertically through the center of nanostripe waveguide. After being excited, the spin wave is transmitted at the sides of the waveguide. Numerical simulations of spin-wave transmission and dispersion curves reveal a single, pronounced band gap. Moreover, the periodic magnetization structure can be turned on and off by the spin-polarized current. The switching process from full rejection to full transmission takes place within less than 3ns. Thus, this type magnonic waveguide can be utilized for low-dissipation spin wave based filters.
Keywords:spin waves, magnonics, spin-polarized current

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