Overview Statistic: PDF-Downloads (blue) and Frontdoor-Views (gray)
  • Treffer 5 von 11
Zurück zur Trefferliste

Thermally active nanoparticle clusters enslaved by engineered domain wall traps

  • The stable assembly of fluctuating nanoparticle clusters on a surface represents a technological challenge of widespread interest for both fundamental and applied research. Here we demonstrate a technique to stably confine in two dimensions clusters of interacting nanoparticles via size-tunable, virtual magnetic traps. We use cylindrical Bloch walls arranged to form a triangular lattice of ferromagnetic domains within an epitaxially grown ferrite garnet film. At each domain, the magnetic stray field generates an effective harmonic potential with a field tunable stifness. The experiments are combined with theory to show that the magnetic confinement is effectively harmonic and pairwise interactions are of dipolar nature, leading to central, strictly repulsive forces. For clusters of magnetic nanoparticles, the stationary collective states arise from the competition between repulsion, confinement and the tendency to fill the central potential well. Using a numerical simulation model as a quantitative map between the experiment and theory we explore the field-induced crystallization process for larger clusters and unveil the existence of three different dynamical regimes. The present method provides a model platform for investigations of the collective phenomena emerging when strongly confined nanoparticle clusters are forced to move in an idealized, harmonic-like potential.

Metadaten exportieren

Weitere Dienste

Teilen auf Twitter Suche bei Google Scholar Statistik - Anzahl der Zugriffe auf das Dokument
Metadaten
Verfasserangaben:Pietro Tierno, Tom H. Johansen, Arthur StraubeORCiD
Dokumentart:Artikel
Titel des übergeordneten Werkes (Englisch):Nature Commun.
Band:12
Erste Seite:5813
Jahr der Erstveröffentlichung:2021
DOI:https://doi.org/10.1038/s41467-021-25931-7
Lizenz (Deutsch):License LogoCreative Commons - CC BY - Namensnennung 4.0 International
Accept ✔
Diese Webseite verwendet technisch erforderliche Session-Cookies. Durch die weitere Nutzung der Webseite stimmen Sie diesem zu. Unsere Datenschutzerklärung finden Sie hier.