Curvature-driven ac-assisted creep dynamics of magnetic domain walls

Article

关键词: INTERFACES;    SYSTEMS;   

DOI  :  10.1103/PhysRevB.103.L220409

来源: SCIE

【 摘 要 】

The dynamics of micrometer-sized magnetic domains in ultrathin 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.

【 授权许可】

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