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Chin. Phys. B, 2017, Vol. 26(1): 017502    DOI: 10.1088/1674-1056/26/1/017502

Faster vortex core switching with lower current density using three-nanocontact spin-polarized currents in a confined structure

Hua-Nan Li(李化南), Zhong Hua(华中), Dong-Fei Li(李东飞)
College of Physics, Jilin Normal University, Siping 136000, China
Abstract  We perform micromagnetic simulations on the switching of magnetic vortex core by using spin-polarized currents through a three-nanocontact geometry. Our simulation results show that the current combination with an appropriate current flow direction destroys the symmetry of the total effective energy of the system so that the vortex core can be easier to excite, resulting in less critical current density and a faster switching process. Besides its fundamental significance, our findings provide an additional route to incorporating magnetic vortex phenomena into data storage devices.
Keywords:  magnetic vortex core      polarity switching      spin-polarized current      micromagnetic simulations  
Received:  31 July 2016      Revised:  25 September 2016      Accepted manuscript online: 
PACS:  75.70.Kw (Domain structure (including magnetic bubbles and vortices))  
  67.30.hj (Spin dynamics)  
  72.25.Ba (Spin polarized transport in metals)  
  75.40.Mg (Numerical simulation studies)  
Fund: Project supported by the China Postdoctoral Science Foundation (Grant No. 2013M541286), the Science and Technology Planning Project of Jilin Province, China (Grant Nos. 20140520109JH and 20150414003GH), and the "Twelfth Five year" Scientific and Technological Research Project of Department of Education of Jilin Province, China.
Corresponding Authors:  Zhong Hua     E-mail:

Cite this article: 

Hua-Nan Li(李化南), Zhong Hua(华中), Dong-Fei Li(李东飞) Faster vortex core switching with lower current density using three-nanocontact spin-polarized currents in a confined structure 2017 Chin. Phys. B 26 017502

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