Cited 4 time in webofscience Cited 4 time in scopus

Dynamic trajectory analysis of superparamagnetic beads driven by on-chip micromagnets

Title
Dynamic trajectory analysis of superparamagnetic beads driven by on-chip micromagnets
Authors
Hu, XH[Hu, Xinghao]Abedini-Nassab, R[Abedini-Nassab, Roozbeh]Lim, B[Lim, Byeonghwa]Yang, Y[Yang, Ye]Howdyshell, M[Howdyshell, Marci]Sooryakumar, R[Sooryakumar, Ratnasingham]Yellen, BB[Yellen, Benjamin B.]Kim, C[Kim, CheolGi]
DGIST Authors
Lim, B[Lim, Byeonghwa]; Kim, C[Kim, CheolGi]
Issue Date
2015-11-28
Citation
Journal of Applied Physics, 118(20)
Type
Article
Article Type
Article
Keywords
Critical FrequenciesDriving FrequenciesDynamic TrajectoriesLocal MagnetizationLocks (Fasteners)MagnetismNon-Linear DynamicsRotating DisksRotating Magnetic FieldsSuperparamagnetic BeadsSuperparamagnetismTracking (Position)Universal Properties
ISSN
0021-8979
Abstract
We investigate the non-linear dynamics of superparamagnetic beads moving around the periphery of patterned magnetic disks in the presence of an in-plane rotating magnetic field. Three different dynamical regimes are observed in experiments, including (1) phase-locked motion at low driving frequencies, (2) phase-slipping motion above the first critical frequency fc1, and (3) phase-insulated motion above the second critical frequency fc2. Experiments with Janus particles were used to confirm that the beads move by sliding rather than rolling. The rest of the experiments were conducted on spherical, isotropic magnetic beads, in which automated particle position tracking algorithms were used to analyze the bead dynamics. Experimental results in the phase-locked and phase-slipping regimes correlate well with numerical simulations. Additional assumptions are required to predict the onset of the phase-insulated regime, in which the beads are trapped in closed orbits; however, the origin of the phase-insulated state appears to result from local magnetization defects. These results indicate that these three dynamical states are universal properties of bead motion in non-uniform oscillators. © 2015 AIP Publishing LLC.
URI
http://hdl.handle.net/20.500.11750/2809
DOI
10.1063/1.4936219
Publisher
American Scientific Publishers
Files:
There are no files associated with this item.
Collection:
Emerging Materials ScienceETC1. Journal Articles


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