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Adiabatic magnetothermia makes possible the study of the temperature dependence of the heat dissipated by magnetic nanoparticles under alternating magnetic fields

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3 Author(s)
Natividad, Eva ; Instituto de Ciencia de Materiales de Aragón (ICMA), CSIC–Universidad de Zaragoza, Sede Campus Río Ebro, María de Luna, 3, 50018 Zaragoza, Spain ; Castro, Miguel ; Mediano, A.

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Determining the low-temperature dependence of the specific absorption rate (SAR) of magnetic nanoparticles under alternating magnetic fields with amplitudes and frequencies similar to those used in applications such as magnetic fluid hyperthermia, becomes essential when theoretical expressions fail to extrapolate the behavior of nanoparticle arrangements. We prove that adiabatic magnetothermia is capable of providing SAR(T) data displaying an excellent continuity with those obtained from magnetic measurements at lower ac-field amplitudes and frequencies.

Published in:

Applied Physics Letters  (Volume:98 ,  Issue: 24 )