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Fast in-situ Switching of Vortex Cores by Resonant Perpendicular Magnetic Field
Wang Ruifang 1 * #,Dong Xinwei 2
1.Department of physics, Xiamen University, FuJian XiaMen 361005
2.Department of physics, Xiamen University, Xiamen 361005
*Correspondence author
#Submitted by
Subject:
Funding: Specialized Research Fund for the Doctoral Program of Higher Education in China under Grant（No.No. 20090121120029）
Opened online:18 March 2013
Accepted by: none
Citation: Wang Ruifang,Dong Xinwei.Fast in-situ Switching of Vortex Cores by Resonant Perpendicular Magnetic Field[OL]. [18 March 2013] http://en.paper.edu.cn/en_releasepaper/content/4528023
 
 
We conduct micromagnetic numerical studies on ultrafast switching of magnetic vortex cores by perpendicular magnetic field that oscillates at the eigenfrequency of a permalloy nanodisk. Our calculations show that resonant magnetic field of 30 mT in amplitude stimulates strong axially symmetric magnetization oscillation and forces vortex core to stay at the center of the nanodisk. The compression of vortex core by spin wave leads to core reversal at 602 picosecond. This switching process is mediated by propagation of a Neel wall across the sample thickness.
Keywords:magnetic vortex; spin dynamics; nanomagnetism
 
 
 

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