Magneto-mechanical resonance of a single superparamagnetic microbead trapped by a magnetic domain wall
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Beach_Magneto-mechanical.pdf
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1.04 MB
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Adobe PDF
Checksum (MD5)
a692a4bcb557b8b1a134117b1ce12dd8
Author(s)
Rapoport, Elizabeth Ashera
Beach, Geoffrey Stephen
Date Issued
February 2012
Journal
Journal of Applied Physics
Publisher
American Institute of Physics
Citation
Rapoport, Elizabeth, and Geoffrey S. D. Beach. Magneto-mechanical Resonance of a Single Superparamagnetic Microbead Trapped by a Magnetic Domain Wall. Journal of Applied Physics 111, no. 7 (2012): 07B310.© 2012 American Institute of Physics.
Version
Final published version
Abstract
Magnetic domain walls in ferromagnetic tracks can be used to trap and transport superparamagnetic beads for lab-on-a-chip applications. Here it is shown that the magnetostatic binding between a domain wall and a superparamagnetic bead suspended in a host fluid leads to a distinct magneto-mechanical resonance under application of a sinusoidal driving field. The characteristic resonant frequency depends on the ratio of the magnetostatic binding force to the viscous drag on the bead. This resonance has been experimentally detected for a single trapped superparamagnetic bead using an optical detection technique.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1063/1.3672406
