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

doi:10.1088/1674-1056/26/1/017502

中国物理B ›› 2017, Vol. 26 ›› Issue (1): 17502-017502.doi: 10.1088/1674-1056/26/1/017502

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

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

收稿日期:2016-07-31 修回日期:2016-09-25 出版日期:2017-01-05 发布日期:2017-01-05
通讯作者: Zhong Hua E-mail:huazhongnan@126.com
基金资助:
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.

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

Received:2016-07-31 Revised:2016-09-25 Online:2017-01-05 Published:2017-01-05
Contact: Zhong Hua E-mail:huazhongnan@126.com
Supported by:
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.

摘要/Abstract

摘要： 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.

关键词: magnetic vortex core, polarity switching, spin-polarized current, micromagnetic simulations

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.

Key words: magnetic vortex core, polarity switching, spin-polarized current, micromagnetic simulations

中图分类号: (Domain structure (including magnetic bubbles and vortices))

75.70.Kw

67.30.hj (Spin dynamics) 72.25.Ba (Spin polarized transport in metals) 75.40.Mg (Numerical simulation studies)

李化南, 华中, 李东飞. Faster vortex core switching with lower current density using three-nanocontact spin-polarized currents in a confined structure[J]. 中国物理B, 2017, 26(1): 17502-017502.

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[J]. Chin. Phys. B, 2017, 26(1): 17502-017502.

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

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

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