Magnetic droplet solitons generated by pure spin currents

Abstract

Magnetic droplets are dynamical solitons that can be generated by locally suppressing the dynamical damping in magnetic films with perpendicular anisotropy. To date, droplets have been observed only in nanocontact spin-torque oscillators operated by spin-polarized electrical currents. Here, we experimentally demonstrate that magnetic droplets can be nucleated and sustained by pure spin currents in nanoconstriction-based spin Hall devices. Micromagnetic simulations support our interpretation of the data, and indicate that in addition to the stationary droplets, propagating solitons can be also generated in the studied system, which can be utilized for the information transmission in spintronic applications.

References in corpus (7)

• Matching domain wall configuration and spin-orbit torques for very efficient domain-wall motion
• Magnetization oscillations and waves driven by pure spin currents
• Theory for a dissipative droplet soliton excited by a spin torque nanocontact
• Stable Magnetic Droplet Solitons in Spin Transfer Nanocontacts
• Nanoconstriction spin-Hall oscillator with perpendicular magnetic anisotropy
• Route toward high-speed nano-magnonics
• Direct observation of magnetic droplet solitons in all-perpendicular spin torque nano-oscillators

Cited by in corpus (4)

• Magnetic Droplet Solitons
• Stochastic ejection of nanocontact droplet solitons via drift instability
• Propagating magnetic droplet solitons as moveable nanoscale spin-wave sources with tunable direction of emission
• Thermal Activation Barriers for Creation and Annihilation of Magnetic Droplet Solitons in the Presence of Spin Transfer Torque