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Lee, Ki-Suk
Creative Lab. for Advanced Spin Systems (CLASS)
Research Interests
  • Magnetism, spintronics, spin dynamics, rare-earth free magnet

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Polarization-selective vortex-core switching by tailored orthogonal Gaussian-pulse currents

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Title
Polarization-selective vortex-core switching by tailored orthogonal Gaussian-pulse currents
Author
Yu, Young-SangLee, Ki-SukJung, HyunsungChoi, Youn-SeokYoo, Myoung-WooHan, Dong-SooIm, Mi-YoungFischer, PeterKim, Sang-Koog
Keywords
SPINTRONICS; FIELD
Issue Date
2011-05
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW B, v.83, no.17, pp.1 - 7
Abstract
We experimentally demonstrate low-power-consumption vortex-core switching in magnetic nanodisks using tailored rotating magnetic fields produced with orthogonal and unipolar Gaussian-pulse currents. The optimal width of the orthogonal pulses and their time delay are found, from analytical and micromagnetic numerical calculations, to be determined only by the angular eigenfrequency ωD for a given vortex-state disk of polarization p, such that σ=1/ωD and Δt= π2p/ωD. The estimated optimal pulse parameters are in good agreement with the experimental results. This work lays a foundation for energy-efficient information recording in vortex-core cross-point architecture.
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DOI
10.1103/PhysRevB.83.174429
ISSN
2469-9950
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MSE_Journal Papers
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