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Journal Articles Journal of Magnetism and Magnetic Materials Year : 2010

Large specific absorption rates in the magnetic hyperthermia properties of metallic iron nanocubes

Abstract

We report on the magnetic hyperthermia properties of chemically synthesized ferromagnetic 11 and 16 nm Fe(0) nanoparticles of cubic shape displaying the saturation magnetization of bulk iron. The specific absorption rate measured on 16 nm nanocubes is 1690±160 W/g at 300 kHz and 66 mT. This corresponds to specific losses-per-cycle of 5.6 mJ/g, largely exceeding the ones reported in other systems. A way to quantify the degree of optimization of any system with respect to hyperthermia applications is proposed. Applied here, this method shows that our nanoparticles are not fully optimized, probably due to the strong influence of magnetic interactions on their magnetic response. Once protected from oxidation and further optimized, such nano-objects could constitute efficient magnetic cores for biomedical applications requiring very large heating power.
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Dates and versions

hal-03550581 , version 1 (01-02-2022)

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Boubker Mehdaoui, Anca Meffre, Lise-Marie Lacroix, Julian Carrey, Sébastien Lachaize, et al.. Large specific absorption rates in the magnetic hyperthermia properties of metallic iron nanocubes. Journal of Magnetism and Magnetic Materials, 2010, 322 (19), pp.L49-L52. ⟨10.1016/j.jmmm.2010.05.012⟩. ⟨hal-03550581⟩
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