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

Christian Haase | Zendy; U. Nowak | Zendy

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

Author(s) -

Christian Haase,

U. Nowak

Publication year - 2012

Publication title -

physical review b

Language(s) - English

Resource type - Journals

eISSN - 1538-4489

pISSN - 1098-0121

DOI - 10.1103/physrevb.85.045435

Subject(s) - dipole , magnetic nanoparticles , nanoparticle , magnetic dipole , condensed matter physics , hyperthermia , materials science , particle (ecology) , langevin dynamics , discrete dipole approximation , statistical physics , physics , nanotechnology , quantum mechanics , meteorology , oceanography , geology

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. I. INTRODUCTION

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