The influence of polydispersity on the structural properties of the isotropic phase of magnetic nanoplatelets

Autor(en)

Margaret Rosenberg, Žiga Gregorin, Patricija Hribar Boštjančič, Nerea Sebastián, Darja Lisjak, Sofia Kantorovich, Alenka Mertelj, Pedro A. Sánchez

Abstrakt

By employing a combination of Molecular Dynamics simulations and experimental SAXS studies, we investigate low-concentration suspensions of polydisperse magnetic platelets with dipole moments perpendicular to the platelets' plane. Exploiting the precise control of platelet size and shape in simulation, we are also able to contrast these results with equivalent density monodisperse suspensions. We show how the polydispersity may lead to the reduction of the orientational and spatial correlations in the absence of an applied field, while simultaneously facilitating the field-induced transition into a nematic-like phase. Along with structural properties, we investigate the magnetic response. This allows us to confirm that the inter-platelet magnetic correlations have a negligible influence on the structure of the low-density suspensions.

Organisation(en)

Computergestützte Physik und Physik der Weichen Materie

Externe Organisation(en)

Jožef Stefan Institute (IJS), Ural Federal University, Wolfgang Pauli Institute (WPI) Vienna

Journal

Journal of Molecular Liquids

Band

312

Anzahl der Seiten

10

ISSN

0167-7322

DOI

https://doi.org/10.1016/j.molliq.2020.113293

Publikationsdatum

05-2020

Peer-reviewed

Ja

ÖFOS 2012

103043 Computational Physics

Schlagwörter

ASJC Scopus Sachgebiete

Electronic, Optical and Magnetic Materials, Condensed Matter Physics, Materials Chemistry, Atomic and Molecular Physics, and Optics, Spectroscopy, Physical and Theoretical Chemistry

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/027e3b49-09c6-4290-af99-2941fbb34806