Observation of droplet soliton drift resonances in a spin-transfer-torque nanocontact to a ferromagnetic thin film

Abstract

Magnetic droplet solitons are non-linear dynamical modes that can be excited in a thin film with perpendicular magnetic anisotropy with a spin-transfer-torque. Although droplet solitons have been proved to be stable with a hysteretic response to applied currents and magnetic fields at low temperature, measurements at room temperature indicate less stability and reduced hysteresis width. Here, we report evidence of droplet soliton drift instabilities, leading to drift resonances, at room temperature that explains their lower stability. Micromagnetic simulations show that the drift instability is produced by an effective field asymmetry in the nanocontact region that can have different origins.

5 pages, 5 figures. Supplemental material: 5 pages, 5 figures

References in corpus (3)

• Theory for a dissipative droplet soliton excited by a spin torque nanocontact
• Stable Magnetic Droplet Solitons in Spin Transfer Nanocontacts
• Direct Observation of Large Amplitude Spin Excitations Localized in a Spin-Transfer Nanocontact

Cited by in corpus (18)

• Direct Observation of Large Amplitude Spin Excitations Localized in a Spin-Transfer Nanocontact
• Parametric Auto-Excitation of Magnetic Droplet Soliton Perimeter Modes
• Merging droplets in double nano-contact spin torque oscillators
• Magnetic droplet solitons generated by pure spin currents
• Symmetry-broken dissipative exchange flows in thin-film ferromagnets with in-plane anisotropy
• Effects of thermal perturbations on magnetic dissipative droplet solitons
• Magnetic Droplet Soliton Nucleation in Oblique Fields
• Magnetic Droplet Solitons
• Freezing and thawing magnetic droplet solitons
• Effect of temperature on spin-transfer torque induced magnetic solitons
• Generation and stability of dynamical skyrmions and droplet solitons
• Chiral excitations of magnetic droplet solitons driven by their own inertia
• Spin-torque switching mechanisms of perpendicular magnetic tunnel junctions nanopillars
• Stochastic ejection of nanocontact droplet solitons via drift instability
• Tuning the dynamics of magnetic droplet solitons using dipolar interactions
• Thermal Activation Barriers for Creation and Annihilation of Magnetic Droplet Solitons in the Presence of Spin Transfer Torque
• Transverse instabilities of stripe domains in magnetic thin films with perpendicular magnetic anisotropy
• Thermally Activated Transitions Between Micromagnetic States