Curvature-driven AC-assisted creep dynamics of magnetic domain walls
arXiv:2012.09377 · doi:10.1103/PhysRevB.103.L220409
Abstract
The dynamics of micrometer-sized magnetic domains in ultra-thin ferromagnetic films is so dramatically slowed down by quenched disorder that the spontaneous elastic tension collapse becomes unobservable at ambient temperature. By magneto-optical imaging we show that a weak zero-bias AC magnetic field can assist such curvature-driven collapse, making the area of a bubble to reduce at a measurable rate, in spite of the negligible effect that the same curvature has on the average creep motion driven by a comparable DC field. An analytical model explains this phenomenon quantitatively.
arXiv comment5 pages, 3 figures. Ancillary Material included
References in corpus (30)
- Theory of Phase Ordering Kinetics
- Creep and flow regimes of magnetic domain wall motion in ultrathin Pt/Co/Pt films with perpendicular anisotropy
- Domain wall creep in epitaxial ferroelectric Pb(Zr0.2Ti0.8)O3 thin films
- Creep and depinning in disordered media
- Vortex-glass phases in type-II superconductors
- Pinning and Sliding of Driven Elastic Systems: from Domain Walls to Charge Density Waves
- Hysteretic dynamics of domain walls at finite temperatures
- Universal pinning energy barrier for driven domain walls in thin ferromagnetic films
- Dynamics below the depinning threshold
- Pinning dependent field driven domain wall dynamics and thermal scaling in an ultrathin Pt/Co/Pt magnetic film
- Creep dynamics of elastic manifolds via exact transition pathways
- Pinning of Domain Walls in thin Ferromagnetic Films
- Universal Depinning Transition of Domain Walls in Ultrathin Ferromagnets
- Numerical Approaches on Driven Elastic Interfaces in Random Media
- Perpendicular magnetization reversal in Pt/[Co/Ni]/Al multilayers via the Spin Hall Effect of Pt
- Evolution of curves and surfaces by mean curvature
- Spatio-temporal patterns in ultra-slow domain wall creep dynamics
- Domain Wall Depinning in Random Media by AC Fields
- Creep motion of elastic interfaces driven in a disordered landscape
- Magnetic domain wall creep and depinning: a scalar field model approach
- Domain Wall Roughness in Stripe Phase BiFeO Thin Films
- Intermittent collective dynamics of domain walls in the creep regime
- Transient magnetic domain wall AC dynamics by means of MOKE microscopy
- Common universal behaviors of magnetic domain walls driven by spin-polarized electrical current and magnetic field
- Excess velocity of magnetic domain walls close to the depinning field
- Universal dimensional crossover of domain wall dynamics in ferromagnetic films
- From bulk descriptions to emergent interfaces: connecting the Ginzburg-Landau and elastic line models
- Impact of growth conditions on the domain nucleation and domain wall propagation in Pt/Co/Pt stacks
- Degradation of domains with sequential field application
- Tuning Ginzburg-Landau theory to quantitatively study thin ferromagnetic materials