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

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

2010-10-15

arxiv.org/abs/1010.3061v2

Phys. Rev. B. 83, 174429 (2011)

Physics

Condensed Matter

Materials Science

32 pages, 10 figures

Scientific paper

10.1103/PhysRevB.83.174429

We experimentally demonstrate low-power-consumption vortex-core switching in magnetic nanodisks using tailored rotating magnetic fields that are produced with orthogonal and unipolar Gaussian-pulse currents. Optimal width of the orthogonal pulses and their time delay are found to be determined only by the angular eigenfrequency {\omega}_D for a given vortex-state disk of its polarization p, such that {\sigma} = 1/{\omega}_D and {\Delta}t = {\pi}p/2{\omega}_D, as studied from analytical and micromagnetic numerical calculations. The estimated optimal pulse parameters are in good agreements with the experimentally found results. This work provides a foundation for energy-efficient information recording in vortex-core cross-point architecture.

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