Heating ability of magnetic nanoparticles with cubic and combined anisotropy

Beilstein Journal of Nanotechnology
Nikolai A UsovNatalia B Epshtein

Abstract

The low frequency hysteresis loops and specific absorption rate (SAR) of assemblies of magnetite nanoparticles with cubic anisotropy are calculated in the diameter range of D = 20-60 nm taking into account both thermal fluctuations of the particle magnetic moments and strong magneto-dipole interaction in assemblies of fractal-like clusters of nanoparticles. Similar calculations are also performed for assemblies of slightly elongated magnetite nanoparticles having combined magnetic anisotropy. A substantial dependence of the SAR on the nanoparticle diameter is obtained for all cases investigated. Due to the influence of the magneto-dipole interaction, the SAR of fractal clusters of nanoparticles decreases considerably in comparison with that for weakly interacting nanoparticles. However, the ability of magnetic nanoparticle assemblies to generate heat can be improved if the nanoparticles are covered by nonmagnetic shells of appreciable thickness.

References

Aug 16, 2000·Journal of Colloid and Interface Science·A V FilippovD E Rosner
Aug 24, 2013·International Journal of Hyperthermia : the Official Journal of European Society for Hyperthermic Oncology, North American Hyperthermia Group·Silvio Dutz, Rudolf Hergt
Jan 9, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·Maria Elena MateriaTeresa Pellegrino
Aug 16, 2017·Nanoscale Research Letters·N A UsovV P Tarasov

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Citations

Jul 30, 2019·Beilstein Journal of Nanotechnology·Hajar JaliliVolodymyr A Chernenko
Jul 9, 2020·Nanomaterials·Nikolai A Usov, Elizaveta M Gubanova
Aug 25, 2020·Beilstein Journal of Nanotechnology·Mihaela Osaci, Matteo Cacciola
Dec 7, 2019·Beilstein Journal of Nanotechnology·Nikolai A UsovVasiliy A Bautin
Jul 28, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Shota KobayashiYasushi Takemura
Aug 15, 2020·Scientific Reports·N A Usov, O N Serebryakova

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