Out-of-plane current controlled switching of the fourfold degenerate state of a magnetic vortex in soft magnetic nanodots | Zendy

Youn-Seok Choi | Zendy; Myoung-Woo Yoo | Zendy; KiSuk Lee | Zendy; YoungSang Yu | Zendy; Hyunsung Jung | Zendy; SangKoog Kim | Zendy

Open Access

Out-of-plane current controlled switching of the fourfold degenerate state of a magnetic vortex in soft magnetic nanodots

Author(s) -

Youn-Seok Choi,

Myoung-Woo Yoo,

KiSuk Lee,

YoungSang Yu,

Hyunsung Jung,

SangKoog Kim

Publication year - 2010

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.3310017

Subject(s) - nanodot , vortex , vortex state , condensed matter physics , magnetic field , current density , nanopillar , polarization (electrochemistry) , degenerate energy levels , micromagnetics , physics , materials science , nanotechnology , superconductivity , magnetization , nanostructure , chemistry , quantum mechanics , mechanics

We report on an observation of transitions of the fourfold degenerate state of a magnetic vortex in soft magnetic nanodots by micromagnetic numerical calculations. The quaternary vortex states in patterned magnetic dots were found to be controllable by changing the density of out-of-plane dc or pulse currents applied to the dots. Each vortex state can be switched to any of the other states by applying different sequence combinations of individual single-step pulse currents. Each step pulse has a characteristic threshold current density and direction. This work offers a promising way for manipulating both the polarization and chirality of magnetic vortices.open161

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