Dynamic binding of driven interfaces in coupled ultrathin ferromagnetic layers

Abstract

We demonstrate experimentally dynamic interface binding in a system consisting of two coupled ferromagnetic layers. While domain walls in each layer have different velocity-field responses, for two broad ranges of the driving field, H, walls in the two layers are bound and move at a common velocity. The bound states have their own velocity-field response and arise when the isolated wall velocities in each layer are close, a condition which always occurs as H->0. Several features of the bound states are reproduced using a one dimensional model, illustrating their general nature.

5 pages, 4 figures, to be published in Physical Review Letters

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• Creep and depinning in disordered media
• Two-dimensional scaling properties of experimental fracture surfaces
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Cited by in corpus (12)

• Pinning of Domain Walls in thin Ferromagnetic Films
• Velocity enhancement by synchronization of magnetic domain walls
• 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
• Creep and thermal rounding close to the elastic depinning threshold
• Spin-valve Josephson junctions with perpendicular magnetic anisotropy for cryogenic memory
• Domain wall structure in magnetic bilayers with perpendicular anisotropy
• A numerical study of the statistics of roughness parameters for fluctuating interfaces
• Model of bound interface dynamics for coupled magnetic domain walls
• Asymmetric depinning of chiral domain walls in ferromagnetic trilayers
• Time-resolved measurement of spin excitations in Cu${}_2$OSeO${}_3$
• Diffusion between evolving interfaces