Magnetic Droplet Solitons
arXiv:2006.08808 · doi:10.1063/5.0018251
Abstract
Magnetic droplet solitons are dynamical magnetic textures that form due to an attractive interaction between spin waves in thin films with perpendicular magnetic anisotropy. Spin currents and the spin torques associated with these currents enable their formation as they provide a means to excite non-equilibrium spin wave populations and compensate their decay. Recent years have seen rapid advances in experiments that realize and study magnetic droplets. Important advances include the first direct x-ray images of droplets, determination of their threshold and sustaining currents, measurement of their generation and annihilation time and evidence for drift instabilities, which can limit their lifetime in spin-transfer nanocontacts. This article reviews these studies and contrasts these solitons to other types of spin-current excitations such as spin-wave bullets, and static magnetic textures, including magnetic vortices and skyrmions. Magnetic droplet solitons can also serve as current controlled microwave frequency oscillators with potential applications in neuromorphic chips as nonlinear oscillators with memory.
arXiv comment9 pages, 9 figures
References in corpus (42)
- Antiferromagnetic spintronics
- Antiferromagnetic spintronics
- Advances in the Physics of Magnetic Skyrmions and Perspective for Technology
- Blowing Magnetic Skyrmion Bubbles
- Roles of non-equilibrium conduction electrons on magnetization dynamics of ferromagnets
- Spin torque building blocks
- Magnetic vortex oscillator driven by dc spin-polarized current
- Vowel recognition with four coupled spin-torque nano-oscillators
- Synchronization of spin-transfer oscillators driven by stimulated microwave currents
- Tailoring magnetic energies to form dipole skyrmions and skyrmion lattices
- Spin Transfer Dynamics in Spin Valves with Out-of-plane Magnetized CoNi Free Layers
- Magnetization oscillations and waves driven by pure spin currents
- Theory for a dissipative droplet soliton excited by a spin torque nanocontact
- Current-Induced Magnetization Reversal in High Magnetic Fields in Co/Cu/Co Nanopillars
- Dynamical Skyrmion State in a Spin Current Nano-Oscillator with Perpendicular Magnetic Anisotropy
- Stable Magnetic Droplet Solitons in Spin Transfer Nanocontacts
- Spin wave excitation in magnetic insulators by spin-transfer torque
- Spin-wave interference patterns created by spin-torque nano-oscillators for memory and computation
- Direct observation and imaging of a spin-wave soliton with like symmetry
- Direct Observation of Large Amplitude Spin Excitations Localized in a Spin-Transfer Nanocontact
- Propagation and control of nano-scale, magnetic droplet solitons
- Non-white frequency noise in spin torque oscillators and its effect on spectral linewidth
- Microwave soft x-ray microscopy for nanoscale magnetization dynamics in the 5-10 GHz frequency range
- Observation of droplet soliton drift resonances in a spin-transfer-torque nanocontact to a ferromagnetic thin film
- Planar Hall driven torque in a FM/NM/FM system
- Parametric Auto-Excitation of Magnetic Droplet Soliton Perimeter Modes
- Size dependence of spin-torque switching in perpendicular magnetic tunnel junctions
- Merging droplets in double nano-contact spin torque oscillators
- Magnetic droplet solitons generated by pure spin currents
- Propagating two-dimensional magnetic droplets
- Attraction, Merger, Reflection, and Annihilation in Magnetic Droplet Soliton Scattering
- Effects of thermal perturbations on magnetic dissipative droplet solitons
- Understanding nanoscale temperature gradients in magnetic nanocontacts
- Generation and annihilation time of magnetic droplet solitons
- Magnetodynamics in orthogonal nanocontact spin-torque nano-oscillators based on magnetic tunnel junctions
- Effect of temperature on spin-transfer torque induced magnetic solitons
- Designing Magnetic Droplet Soliton Nucleation Employing Spin Polarizer
- Generation and stability of dynamical skyrmions and droplet solitons
- Spin-torque switching mechanisms of perpendicular magnetic tunnel junctions nanopillars
- 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
- A Frequency-Phase Potential for a Forced STNO Network: an Example of Evoked Memory
Cited by in corpus (6)
- Freezing and thawing magnetic droplet solitons
- Effects of the Zhang-Li Torque on Spin Torque nano Oscillators
- Tuning the dynamics of magnetic droplet solitons using dipolar interactions
- Magnetic skyrmion generation by reflective spin-wave focusing
- Antiferromagnetic droplet soliton driven by spin current
- Thermally Activated Transitions Between Micromagnetic States