Transport dynamics of superparamagnetic microbeads trapped by mobile magnetic domain walls
The dynamics of fluid-borne superparamagnetic bead transport by field-driven domain walls (DWs) in submicrometer ferromagnetic tracks is studied experimentally together with numerical and analytical modeling. A combination of micromagnetic modeling and numerical calculation is used to determine the...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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American Physical Society
2014
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| Online Access: | http://hdl.handle.net/1721.1/88746 |
| _version_ | 1826189374760419328 |
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| author | Rapoport, Elizabeth Beach, Geoffrey Stephen |
| author2 | Massachusetts Institute of Technology. Department of Materials Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Materials Science and Engineering Rapoport, Elizabeth Beach, Geoffrey Stephen |
| author_sort | Rapoport, Elizabeth |
| collection | MIT |
| description | The dynamics of fluid-borne superparamagnetic bead transport by field-driven domain walls (DWs) in submicrometer ferromagnetic tracks is studied experimentally together with numerical and analytical modeling. A combination of micromagnetic modeling and numerical calculation is used to determine the strength of bead-DW interaction for a range of track geometries and bead sizes. The maximum DW velocity for continuous bead transport is predicted from these results and shown to be supported by experimental measurements. Enhancement of the maximum velocity by appropriate material selection or field application is demonstrated, and an analysis of the source of statistical variation is presented. Finally, the dynamics of bead-DW interaction and bead transport above the maximum DW velocity for continuous DW-mediated bead transport is characterized. |
| first_indexed | 2024-09-23T08:13:44Z |
| format | Article |
| id | mit-1721.1/88746 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T08:13:44Z |
| publishDate | 2014 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/887462022-09-30T08:26:19Z Transport dynamics of superparamagnetic microbeads trapped by mobile magnetic domain walls Rapoport, Elizabeth Beach, Geoffrey Stephen Massachusetts Institute of Technology. Department of Materials Science and Engineering Rapoport, Elizabeth Beach, Geoffrey Stephen The dynamics of fluid-borne superparamagnetic bead transport by field-driven domain walls (DWs) in submicrometer ferromagnetic tracks is studied experimentally together with numerical and analytical modeling. A combination of micromagnetic modeling and numerical calculation is used to determine the strength of bead-DW interaction for a range of track geometries and bead sizes. The maximum DW velocity for continuous bead transport is predicted from these results and shown to be supported by experimental measurements. Enhancement of the maximum velocity by appropriate material selection or field application is demonstrated, and an analysis of the source of statistical variation is presented. Finally, the dynamics of bead-DW interaction and bead transport above the maximum DW velocity for continuous DW-mediated bead transport is characterized. Massachusetts Institute of Technology. Center for Materials Science and Engineering National Science Foundation (U.S.) (DMR-0819762) Deshpande Center for Technological Innovation (Massachusetts Institute of Technology. School of Engineering) 2014-08-18T14:25:46Z 2014-08-18T14:25:46Z 2013-05 2013-02 Article http://purl.org/eprint/type/JournalArticle 1098-0121 1550-235X http://hdl.handle.net/1721.1/88746 Rapoport, E., and G. S. D. Beach. “Transport Dynamics of Superparamagnetic Microbeads Trapped by Mobile Magnetic Domain Walls.” Phys. Rev. B 87, no. 17 (May 2013). © 2013 American Physical Society en_US http://dx.doi.org/10.1103/PhysRevB.87.174426 Physical Review B 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. application/pdf American Physical Society American Physical Society |
| spellingShingle | Rapoport, Elizabeth Beach, Geoffrey Stephen Transport dynamics of superparamagnetic microbeads trapped by mobile magnetic domain walls |
| title | Transport dynamics of superparamagnetic microbeads trapped by mobile magnetic domain walls |
| title_full | Transport dynamics of superparamagnetic microbeads trapped by mobile magnetic domain walls |
| title_fullStr | Transport dynamics of superparamagnetic microbeads trapped by mobile magnetic domain walls |
| title_full_unstemmed | Transport dynamics of superparamagnetic microbeads trapped by mobile magnetic domain walls |
| title_short | Transport dynamics of superparamagnetic microbeads trapped by mobile magnetic domain walls |
| title_sort | transport dynamics of superparamagnetic microbeads trapped by mobile magnetic domain walls |
| url | http://hdl.handle.net/1721.1/88746 |
| work_keys_str_mv | AT rapoportelizabeth transportdynamicsofsuperparamagneticmicrobeadstrappedbymobilemagneticdomainwalls AT beachgeoffreystephen transportdynamicsofsuperparamagneticmicrobeadstrappedbymobilemagneticdomainwalls |