Pinning dependent field driven domain wall dynamics and thermal scaling in an ultrathin Pt/Co/Pt magnetic film

Abstract

Magnetic field-driven domain wall motion in an ultrathin Pt/Co(0.45nm)/Pt ferromagnetic film with perpendicular anisotropy is studied over a wide temperature range. Three different pinning dependent dynamical regimes are clearly identified: the creep, the thermally assisted flux flow and the depinning, as well as their corresponding crossovers. The wall elastic energy and microscopic parameters characterizing the pinning are determined. Both the extracted thermal rounding exponent at the depinning transition, $\psi =$0.15, and the Larkin length crossover exponent, $\varphi =$0.24, fit well with the numerical predictions.

5 pages, 4 figures

References in corpus (7)

• Creep and flow regimes of magnetic domain wall motion in ultrathin Pt/Co/Pt films with perpendicular anisotropy
• Dynamics below the depinning threshold
• Creep dynamics of elastic manifolds via exact transition pathways
• Thermal rounding of the depinning transition
• Thermal rounding exponent of the depinning transition of an elastic string in a random medium
• Thermal rounding of the depinning transition in ultrathin Pt/Co/Pt films
• The universal high temperature regime of pinned elastic objects

Cited by in corpus (7)

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• Excess velocity of magnetic domain walls close to the depinning field
• Strong pinning theory of thermal vortex creep in type II superconductors
• Domain size effects on the dynamics of a charge density wave in 1T-TaS2
• Dynamic heterogeneity in an orientational glass
• Skyrmion formation in nanodiscs using magnetic force microscopy tip