Large amplitude vortex gyration in permalloy/Bi2Se3-like heterostructures

@article{Skirdkov2015LargeAV,
  title={Large amplitude vortex gyration in permalloy/Bi2Se3-like heterostructures},
  author={P. N. Skirdkov and K. A. Zvezdin and A D Belanovsky and Jm. George and Ji Chang Wu and Vincent Cros and Anatolii K. Zvezdin},
  journal={Physical Review B},
  year={2015},
  volume={92},
  pages={094432}
}
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/Bi$_2$Se$_3$ heterostructures, in which the huge charge-to-spin conversion ratio is observed \cite{Mellnik-2014}. We consider analytically and by micromagnetic modelling the dependence of this excitation on the frequency and magnitude of the microwave current. The analogies of the… Expand
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References

SHOWING 1-10 OF 45 REFERENCES
Eigenfrequencies of vortex state excitations in magnetic submicron-size disks
We have theoretically and numerically studied the dynamic properties of the vortex magnetic state in soft submicron ferromagnetic dots with variable thickness and diameter. To describe the vortexExpand
Harmonic oscillator model for current-and field-driven magnetic vortices
Institut fu¨r Angewandte Physik und Zentrum fu¨r Mikrostrukturforschung,Universita¨t Hamburg, Jungiusstr. 11, 20355 Hamburg, Germany(Dated: February 2, 2008)In experiments the distinction betweenExpand
Vortex state stability in soft magnetic cylindrical nanodots
The stability of the vortex magnetization state in circular cylindrical soft magnetic dots is calculated analytically and by micromagnetic simulations. For the cases considered the dot thickness isExpand
Spin excitations of magnetic vortices in ferromagnetic nanodots.
Spin excitations of the magnetic vortex state in ferromagnetic nanodots are measured using Brillouin light scattering. Arrays of permalloy dots with 800-nm diameter and 60-nm thickness wereExpand
Spin pumping in Ferromagnet-Topological Insulator-Ferromagnet Heterostructures
TLDR
A study of spin pumping at the TI-ferromagnet interface, investigating spin transfer dynamics in a spin-valve like structure using element specific time-resolved x-ray magnetic circular dichroism, and ferromagnetic resonance is reported. Expand
Vortex-state oscillations in soft magnetic cylindrical dots
We have studied magnetic vortex oscillations in soft submicron cylindrical dots with variable thickness and diameter by an analytical approach and micromagnetic simulations. We have considered twoExpand
Improved domain-wall dynamics and magnonic torques using topological insulators
We investigate the magnetization dynamics that arise when a thin-film ferromagnet is deposited on a topological insulator (TI), focusing in particular on domain-wall motion via current and theExpand
Single-domain circular nanomagnets
The magnetic properties of deep submicron circular nanomagnets fabricated by high-resolution electron beam lithography from Supermalloy Ni80Fe14Mo5 have been studied as a function of both diameterExpand
Magnetic vortex core reversal by excitation with short bursts of an alternating field
TLDR
It is demonstrated that the sense of gyration of the vortex structure can be reversed by applying short bursts of the sinusoidal excitation field with amplitude of about 1.5 mT, unambiguously indicates a switching of the out-of-plane core polarization. Expand
Direct Observation of Internal Spin Structure of Magnetic Vortex Cores
TLDR
The results confirm theoretical predictions that the size and the shape of the vortex core as well as its magnetic field dependence are governed by only two material parameters, the exchange stiffness and the saturation magnetization that determines the stray field energy. Expand
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