Magnetic hyperthermia in single-domain monodisperse FeCo nanoparticles: Evidences for Stoner–Wohlfarth behavior and large losses

2008/10/22 by L. -M. Lacroix, Lise‐Marie Lacroix, R. Bel Malaki +9 · 4 citations
Energy · Engineering · Physics and Astronomy · #Characterization and Applications of Magnetic Nanoparticles #Iron oxide chemistry and applications #Magnetic properties of thin films #cond-mat.mtrl-sci

paper · pdf · doi:10.1063/1.3068195

published as J. Appl. Phys. 105, 023911 (2009) · 14 pages, 3 figures

arxiv created 2008/10/22 · openalex publication_date 2009/01/15 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We report on hyperthermia measurements on a colloidal solution of 14.2±1.5 nm monodisperse FeCo nanoparticles (NPs). Losses as a function of the magnetic field display a sharp increase followed by a plateau, which is what is expected for losses of ferromagnetic single-domain NPs. The frequency dependence of the coercive field is deduced from hyperthermia measurement and is in quantitative agreement with a simple model of noninteracting NPs. The measured losses (1.5 mJ/g) compare to the highest of the literature, although the saturation magnetization of the NPs is well below the bulk one.

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