Generation and stability of dynamical skyrmions and droplet solitons
arXiv:1803.01750 · doi:10.1088/1361-6528/aac411
Abstract
A spin-polarized current in a nanocontact to a magnetic film can create collective magnetic oscillations by compensating the magnetic damping. In particular, in materials with uniaxial magnetic anisotropy, droplet solitons have been observed a self-localized excitation consisting of partially reversed magnetization that precesses coherently in the nanocontact region. It is also possible to generate topological droplet solitons, known as \emph{dynamical skyrmions}. Here we study the conditions that promote either droplet or dynamical skyrmion formation and describe their stability in magnetic films without Dzyaloshinskii-Moriya interactions. We show that Oersted fields from the applied current as well as the initial magnetization state can determine whether a droplet or dynamical skyrmion forms. Dynamical skyrmions are found to be more stable than droplets. We also discuss electrical characteristics that can be used distinguish these magnetic objects.
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Cited by in corpus (6)
- Spin-wave focusing induced skyrmion generation
- Magnetic Droplet Solitons
- Generation and annihilation time of magnetic droplet solitons
- Effects of the Zhang-Li Torque on Spin Torque nano Oscillators
- Thermal Activation Barriers for Creation and Annihilation of Magnetic Droplet Solitons in the Presence of Spin Transfer Torque
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