Electric spectroscopy of vortex states and dynamics in magnetic disks

Details Electric spectroscopy of vortex states and dynamics in magnetic disks Electric spectroscopy of vortex states and dynamics in magnetic disks

2011-06-22

arxiv.org/abs/1106.4516v2

Phys. Rev. B 84, 064406 (2011)

Physics

Condensed Matter

Materials Science

39 pages,1 table, 10 figures

Scientific paper

Spin-polarized radio frequency (RF) currents and RF-Oersted fields resonantly excite a magnetic vortex core confined in a micron-scale soft magnetic disk. In this study, we measured the rectifying voltage spectra caused by the anisotropic magnetoresistance oscillation due to the gyration of the vortex with different polarity and chirality. The measured spectra are presented such that we can determine the vortex properties and strength of the spin torques and Oersted field accurately and directly through analytical calculation.

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