Dynamic binding of driven interfaces in coupled ultrathin ferromagnetic layers

Details Dynamic binding of driven interfaces in coupled ultrathin ferromagnetic layers Dynamic binding of driven interfaces in coupled ultrathin ferromagnetic layers

2010-05-12

arxiv.org/abs/1005.2166v1

Phys. Rev. Lett. 104, 237206 (2010)

Physics

Condensed Matter

Materials Science

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

Scientific paper

10.1103/PhysRevLett.104.237206

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.

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