Role of dipole-dipole interactions for hyperthermia heating of magnetic nanoparticle ensembles

C. Haase and U. Nowak
Phys. Rev. B 85, 045435 – Published 23 January 2012

Abstract

For clinical hyperthermia treatment the heating efficiency of magnetic nanoparticle ensembles is a crucial element. Using efficient algorithms, this heating is studied numerically with a focus on the effects of dipole-dipole interparticle interactions. For the time evolution of realistically modeled systems an approach based on the Landau-Lifschitz-Gilbert equation of motion with Langevin dynamics is taken. Our results suggest a widely negative influence of dipole-dipole interactions on the heating power of nanoparticles. However, considering ensembles within a fixed, given sample volume an optimal particle density exists. The presented results may have important implications for the medical use of magnetic hyperthermia treatment.

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  • Received 19 October 2011

DOI:https://doi.org/10.1103/PhysRevB.85.045435

©2012 American Physical Society

Authors & Affiliations

C. Haase* and U. Nowak

  • Department of Physics, University of Konstanz, D-78464 Konstanz, Germany

  • *chrihaase@gmx.de

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Issue

Vol. 85, Iss. 4 — 15 January 2012

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