Dresden 2026 – scientific programme
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DY: Fachverband Dynamik und Statistische Physik
DY 23: Complex Fluids and Soft Matter (joint session DY/CPP)
DY 23.7: Talk
Tuesday, March 10, 2026, 11:15–11:30, ZEU/0160
Linking molecular dynamics and experimental FORCs in multicore magnetic nanoparticles — Ekaterina Novak1, •Malika Khelfallah2, Andrey Kuznetsov3, Deniz Mostarac4, Claire Carvallo2, Amélie Juhin2, and Sofia Kantorovich3 — 1Ekaterinburg, Russia — 2Sorbonne Université, Paris, France — 3University of Vienna, Vienna, Austria — 4University of Edinburgh, Edinburgh, United Kingdom
Multicore magnetic nanoparticles - clusters of several magnetic grains embedded in a nonmagnetic matrix - exhibit collective behaviour distinct from single-core particles and are promising candidates fro drug targeting and magnetic hyperthermia. Their magnetic cores possess finite anisotropy, and the multicore assemblies range from near-spherical to elongated ellipsoids, features that strongly affect their response to external fields. To study these effects, we use molecular dynamics simulations [1] to model internal structure, anisotropy distribution, and collective switching. As a key diagnostic, we employ First Order Reversal Curves [2], which experimentalists routinely measure for immobilised multicore particles, enabling direct comparison between simulations and experiments. FORC diagrams reveal coercivity distributions and magnetic interactions between grains, offering detailed insight into interaction mechanisms and domain processes.
The work was financially supported by the RSF grant No. 25-22-00762.
[1] R. Weeber et al. (2024), Comprehensive Computational Chemistry, 3, 578-601. [2] C. R. Pike et al., J. Appl. Phys., 1999, 85, 6660
Keywords: molecular dynamics; multicore particles; FORK