Dynamical regimes of a paramagnetic particle circulating a magnetic bubble domain.
We study the dynamics of a single paramagnetic colloidal particle dispersed in water and circulating around a cylindrical magnetic domain ("magnetic bubble") when driven by an external rotating magnetic field. We record the particle trajectories and measure its angular displacement by changing the strength, frequency, and ellipticity of the applied magnetic field and show that this simple system exhibits several interesting phenomena, from synchronous-asynchronous rotations, to localized oscillations. We complement the experimental results with numerical simulations which explore the dynamical regimes of the rotating particle.
Tierno
Pietro
P
Departament de Química Física, Universitat de Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain. ptierno@ub.edu
Johansen
Tom H
TH
Sagués
Francesc
F
D003102:Colloids / Q000737:chemistry* / Q000528:radiation effects*; D003198:Computer Simulation; D004574:Electromagnetic Fields; D045423:Microbubbles; D008956:Models, Chemical; D010316:Particle Size; D012399:Rotation
D003102:Colloids