TY - JOUR

T1 - Structure and dynamics in suspensions of magnetic platelets

AU - Rosenberg, Margaret

AU - Kantorovich, Sofia

AU - Ivanov, Alexey

AU - Camp, Philip

N1 - M. R. acknowledges funding from the Austrian Academy of Science (OeAW) and the Vienna Doctoral School of Physics (VDS-P). We thank Dr R. Weeber and Dr E. Pyanzina for fruitful discussions. Partial research funding from UrFU Program of Development within the Priority-2030 Program is gratefully acknowledged.

PY - 2024

Y1 - 2024

N2 - In this research, we employ Brownian dynamics simulations, density functional theory, and mean-field theory to explore the profound influence of shape anisotropy of magnetic nanoplatelets on suspension magnetic response. Each platelet is modelled as an oblate cylinder with a longitudinal point dipole, with an emphasis on strong dipolar interactions conducive to self-assembly. We investigate static structural and magnetic properties, characterising the system through pair distribution function, static structure factor, and cluster-size distribution. The findings demonstrate that shape-specific interactions and clustering lead to significant changes in reorientational relaxation times. Under zero field, distinctive modes in the dynamic magnetic susceptibility identify individual particles and particle clusters. In the presence of an applied field, the characteristic relaxation time of clusters increases, while that of single particles decreases. This research provides insights into the intricate interplay between shape anisotropy, clustering, and magnetic response in platelet suspensions, offering valuable perspectives for recent experimental observations.This paper explores how the unique shape-defined internal structure of magnetic nanoplatelet suspensions influences their magnetic response.

AB - In this research, we employ Brownian dynamics simulations, density functional theory, and mean-field theory to explore the profound influence of shape anisotropy of magnetic nanoplatelets on suspension magnetic response. Each platelet is modelled as an oblate cylinder with a longitudinal point dipole, with an emphasis on strong dipolar interactions conducive to self-assembly. We investigate static structural and magnetic properties, characterising the system through pair distribution function, static structure factor, and cluster-size distribution. The findings demonstrate that shape-specific interactions and clustering lead to significant changes in reorientational relaxation times. Under zero field, distinctive modes in the dynamic magnetic susceptibility identify individual particles and particle clusters. In the presence of an applied field, the characteristic relaxation time of clusters increases, while that of single particles decreases. This research provides insights into the intricate interplay between shape anisotropy, clustering, and magnetic response in platelet suspensions, offering valuable perspectives for recent experimental observations.This paper explores how the unique shape-defined internal structure of magnetic nanoplatelet suspensions influences their magnetic response.

UR - https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=tsmetrics&SrcApp=tsm_test&DestApp=WOS_CPL&DestLinkType=FullRecord&KeyUT=001215102600001

U2 - 10.1039/D4NR01120A

DO - 10.1039/D4NR01120A

M3 - Article

VL - 16

SP - 10250

EP - 10261

JO - Nanoscale

JF - Nanoscale

SN - 2040-3364

IS - 21

ER -