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Title: Dynamics of a paramagnetic colloidal particle driven on a magnetic-bubble lattice
Author: Soba, A.
Tierno, Pietro
Fischer, Thomas M.
Sagués i Mestre, Francesc
Keywords: Química física
Aparells electrònics
Dispositius magnètics
Física estadística
Sistemes no lineals
Physical chemistry
Electronic apparatus and appliances
Magnetic devices
Statistical physics
Nonlinear systems
Issue Date: 2008
Publisher: The American Physical Society
Abstract: We present a theoretical study of the recently observed dynamical regimes of paramagnetic colloidal particles externally driven above a regular lattice of magnetic bubbles [P. Tierno, T. H. Johansen, and T. M. Fischer, Phys. Rev. Lett. 99, 038303 (2007)]. An external precessing magnetic field alters the potential generated by the surface of the film in such a way to either drive the particle circularly around one bubble, ballistically through the array, or in triangular orbits on the interstitial regions between the bubbles. In the ballistic regime, we observe different trajectories performed by the particles phase locked with the external driving. Superdiffusive motion, which was experimentally found bridging the localized and delocalized dynamics, emerge only by introducing a certain degree of randomness into the bubbles size distribution.
Note: Reproducció del document publicat a:
It is part of: Physical Review E, 2008, vol. 77, núm. 6, p. 060401(R)-1-060401(R)-4
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ISSN: 1063-651X
Appears in Collections:Articles publicats en revistes (Ciència dels Materials i Química Física)

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