Improved efficiency of heat generation in nonlinear dynamics of magnetic nanoparticles

Abstract

The deterministic Landau-Lifshitz-Gilbert equation has been used to investigate the nonlinear dynamics of magnetization and the specific loss power in magnetic nanoparticles with uniaxial anisotropy driven by a rotating magnetic field. We propose a new type of applied field, which is "simultaneously rotating and alternating", i.e. the direction of the rotating external field changes periodically. We show that a more efficient heat generation by magnetic nanoparticles is possible with this new type of applied field and we suggest its possible experimental realization in cancer therapy which requires the enhancement of loss energies.

7 pages, 4 figures, to be published in Phys. Rev. E

References in corpus (3)

• Magnetic particle hyperthermia: Neel relaxation in magnetic nanoparticles under circularly polarized field
• Energy dissipation in single-domain ferromagnetic nanoparticles: Dynamical approach
• Magnetic particle hyperthermia: Power losses under circularly polarized field in anisotropic nanoparticles

Cited by in corpus (6)

• Power Loss for a Periodically Driven Ferromagnetic Nanoparticle in a Viscous Fluid: the Finite Anisotropy Aspects
• Energy dissipation of rigid dipoles in a viscous fluid under the action of a time-periodic field: the influence of thermal bath and dipole interaction
• Induced magnetization and power loss for a periodically driven system of ferromagnetic nanoparticles with randomly oriented easy axes
• Efficiency of magnetic hyperthermia in the presence of rotating and static fields
• Theory of superlocalized magnetic nanoparticle hyperthermia: rotating versus oscillating fields
• Drift of suspended single-domain nanoparticles in a harmonically oscillating gradient magnetic field