Self-assembly and flux closure studies of magnetic nanoparticle rings

Alexander Wei, Takeshi Kasama, Rafal E. Dunin-Borkowski

    Research output: Contribution to journalJournal articleResearchpeer-review


    Thermoremanent magnetic nanoparticles (MNPs) can self-assemble into rings through dipolar interactions, when dispersed under appropriate conditions. Analysis of individual MNP rings and clusters by off-axis electron holography reveals bistable flux closure (FC) states at ambient temperatures, and their reversible switching by magnetic field gradients. We introduce a line-bond formalism to describe the coupling between MNPs.
    Original languageEnglish
    JournalJournal of Materials Chemistry
    Issue number42
    Pages (from-to)16686-16693
    Publication statusPublished - 2011

    Cite this