Large amplitude vortex gyration in permalloy/ Bi2Se3 -like heterostructures

P. N. Skirdkov; K. A. Zvezdin; A. D. Belanovsky; J. M. George; J. C. Wu; V. Cros; A. K. Zvezdin

doi:10.1103/PhysRevB.92.094432

Large amplitude vortex gyration in permalloy/ Bi2Se3 -like heterostructures

P. N. Skirdkov, K. A. Zvezdin, A. D. Belanovsky, J. M. George, J. C. Wu, V. Cros, A. K. Zvezdin

Department of Physics

Research output: Contribution to journal › Article

4 Citations (Scopus)

Abstract

We consider the excitation of large amplitude gyrotropic vortex core precession in a permalloy nanodisk by the torques originating from the in-plane microwave current flowing along the interface of the permalloy/Bi2Se3 heterostructures, in which the huge charge-to-spin conversion ratio is observed [A. Mellnik et al., Nature 511, 449 (2014)NATUAS0028-083610.1038/nature13534]. We consider analytically and by micromagnetic modeling the dependence of this excitation on the frequency and magnitude of the microwave current. The analogies of the vortex dynamics and the Landau phase-transition theory are demonstrated. These findings open the possibility to excite gyrotropic vortex motion with the current densities far lower than by any other means.

Original language	English
Article number	094432
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	92
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevB.92.094432
Publication status	Published - 2015 Sep 18

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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Skirdkov, P. N., Zvezdin, K. A., Belanovsky, A. D., George, J. M., Wu, J. C., Cros, V., & Zvezdin, A. K. (2015). Large amplitude vortex gyration in permalloy/ Bi2Se3 -like heterostructures. Physical Review B - Condensed Matter and Materials Physics, 92(9), [094432]. https://doi.org/10.1103/PhysRevB.92.094432

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abstract = "We consider the excitation of large amplitude gyrotropic vortex core precession in a permalloy nanodisk by the torques originating from the in-plane microwave current flowing along the interface of the permalloy/Bi2Se3 heterostructures, in which the huge charge-to-spin conversion ratio is observed [A. Mellnik et al., Nature 511, 449 (2014)NATUAS0028-083610.1038/nature13534]. We consider analytically and by micromagnetic modeling the dependence of this excitation on the frequency and magnitude of the microwave current. The analogies of the vortex dynamics and the Landau phase-transition theory are demonstrated. These findings open the possibility to excite gyrotropic vortex motion with the current densities far lower than by any other means.",

author = "Skirdkov, {P. N.} and Zvezdin, {K. A.} and Belanovsky, {A. D.} and George, {J. M.} and Wu, {J. C.} and V. Cros and Zvezdin, {A. K.}",

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AU - Skirdkov, P. N.

AU - Zvezdin, K. A.

AU - Belanovsky, A. D.

AU - George, J. M.

AU - Wu, J. C.

AU - Cros, V.

AU - Zvezdin, A. K.

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AB - We consider the excitation of large amplitude gyrotropic vortex core precession in a permalloy nanodisk by the torques originating from the in-plane microwave current flowing along the interface of the permalloy/Bi2Se3 heterostructures, in which the huge charge-to-spin conversion ratio is observed [A. Mellnik et al., Nature 511, 449 (2014)NATUAS0028-083610.1038/nature13534]. We consider analytically and by micromagnetic modeling the dependence of this excitation on the frequency and magnitude of the microwave current. The analogies of the vortex dynamics and the Landau phase-transition theory are demonstrated. These findings open the possibility to excite gyrotropic vortex motion with the current densities far lower than by any other means.

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