Universal Critical Exponents of the Magnetic Domain Wall Depinning Transition

Abstract

Magnetic field driven domain wall dynamics in a ferrimagnetic GdFeCo thin film with perpendicular magnetic anisotropy is studied using low temperature magneto-optical Kerr microscopy. Measurements performed in a practically athermal condition allow for the direct experimental determination of the velocity ($\beta =0.30\pm 0.03$) and correlation length ($\nu =1.3\pm 0.3$) exponents of the depinning transition. The whole family of exponents characterizing the transition is deduced, providing evidence that the depinning of magnetic domain walls is better described by the quenched Edwards-Wilkinson universality class.

6 pages, 3 figures. Ancillary Material with 10 pages and 4 figures is also included

References in corpus (5)

• Pinning dependent field driven domain wall dynamics and thermal scaling in an ultrathin Pt/Co/Pt magnetic film
• Thermal rounding of the depinning transition
• Depinning exponents of the driven long-range elastic string
• Creep motion of elastic interfaces driven in a disordered landscape
• Thermal rounding of the depinning transition in ultrathin Pt/Co/Pt films

Cited by in corpus (7)

• Crack propagation by activated avalanches during creep and fatigue from elastic interface theory
• Depinning and flow of a vortex line in an uniaxial random medium
• Depinning free of the elastic approximation
• Theory and Experiments for Disordered Elastic Manifolds, Depinning, Avalanches, and Sandpiles
• Nonsteady dynamics at the dynamic depinning transition in the two-dimensional Gaussian random-field Ising model
• Effect of Ir growth pressure on the domain wall dynamics in Ta/Pt/Co/Ir/Ta stacks
• Deterministic roughening in the dc-driven precessional regime of domain walls