Dynamics of superparamagnetic microbead transport along magnetic nanotracks by magnetic domain walls

TitleDynamics of superparamagnetic microbead transport along magnetic nanotracks by magnetic domain walls
Publication TypeJournal Article
Year of Publication2012
AuthorsRapoport, E, Beach, GSD
JournalApplied Physics Letters
Volume100
Issue8
Pagination082401
Date Published2012/02/20/
Abstract

The dynamics of fluid-borne superparamagnetic bead transport by field-driven domain walls in submicrometer ferromagnetic tracks is studied experimentally together with numerical and analytical modeling. Experiments show that nanotrack-guided domain walls can propel individual trapped beads through an aqueous medium at speeds approaching 1000 mu m/s, 10 to 100 times faster than through any previously demonstrated mechanism. (C) 2012 American Institute of Physics. [doi:10.1063/1.3684972]