Specific loss power has been measured on γ-Fe2O3 nanoparticles dispersed in water by means of several tech- niques, i.e. heat flow in a calorimeter, hyperthermia, and static and dynamic hysteresis loops. Static hysteresis loops as a function of the maximum applied field underestimate the power losses as dynamic effects are not exploited, but turned out to be a valuable tool to prove the consistency of specific loss power measurements obtained by the other techniques over a wide range of applied magnetic field intensities. A temperature-de- pendence of the specific loss power has been taken into account in hyperthermia measurements performed with a fully modelled non adiabatic experimental setup. Simple mean-field theoretical models (interacting super- paramagnetic, modified Stoner-Wohlfarth) have been exploited to reproduce the static energy losses of the particles.

Specific loss power measurements by calorimetric and thermal methods on T γ-Fe2O3 nanoparticles for magnetic hyperthermia / Coisson, Marco; Barrera, Gabriele; Appino, Carlo; Celegato, Federica; Martino, LUCA UGO; Safronov, Alexander P.; Kurlyandskaya, Galina V.; Tiberto, PAOLA MARIA. - In: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS. - ISSN 0304-8853. - 473:(2019), pp. 403-409. [10.1016/j.jmmm.2018.10.107]

Specific loss power measurements by calorimetric and thermal methods on T γ-Fe2O3 nanoparticles for magnetic hyperthermia

Marco Coïsson
;
Gabriele Barrera;Carlo Appino;Federica Celegato;Luca Martino;Paola Tiberto
2019

Abstract

Specific loss power has been measured on γ-Fe2O3 nanoparticles dispersed in water by means of several tech- niques, i.e. heat flow in a calorimeter, hyperthermia, and static and dynamic hysteresis loops. Static hysteresis loops as a function of the maximum applied field underestimate the power losses as dynamic effects are not exploited, but turned out to be a valuable tool to prove the consistency of specific loss power measurements obtained by the other techniques over a wide range of applied magnetic field intensities. A temperature-de- pendence of the specific loss power has been taken into account in hyperthermia measurements performed with a fully modelled non adiabatic experimental setup. Simple mean-field theoretical models (interacting super- paramagnetic, modified Stoner-Wohlfarth) have been exploited to reproduce the static energy losses of the particles.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11696/59985
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