Heat Dissipation Mechanism for Magnetite Nanoparticle in Magnetic Fluid Hyperthermia

Suto, Makoto; Hirota, Yasutake; Mamiyak, H.; Kasuya, Ryo; Fujita, Akira; Tohji, Kazuyuki; Jeyadevan, B.

doi:10.3379/msjmag.0905rh0009

Cited by 6 publications

(1 citation statement)

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“…Nano-sized FeFe 2 O 4 synthesized by a chemical method has been mainly studied for this therapy. 7), 8) In our previous study, we have reported the MgFe 2 O 4 and the Mg 1¹x Ca x Fe 2 O 4 systems as materials having high heat generation ability in an AC magnetic field. 9)13) Furthermore, we found that Y 3 Fe 5 O 12 has the most superior heat ability among the reported materials.…”

Section: Introductionmentioning

confidence: 99%

Depression of particle growth with calcination at low temperature and their heat generation property in AC magnetic field for the nano-sized magnetic Y3Fe5O12–nSmFeO3 powders prepared by bead-milling

Nishimori

Akiyama

Naohara

et al. 2014

J. Ceram. Soc. Japan

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Nano-sized Y 3 Fe 5 O 12 nSmFeO 3 mixed powder (ca. 20 nm in particle size) was prepared by bead-milling using 0.05 mmº beads for 10 h. For the SmFeO 3 -free sample (n = 0), the heat generation ability in an AC magnetic field (370 kHz, 1.77 kA·m ¹1 ) was 0.34 W·g ¹1 for the bead-milled sample, and it was increased by a calcination at low temperature. The maximum ability of 0.46 W·g ¹1 in an AC magnetic field (370 kHz, 1.77 kA·m ¹1) was obtained for the Y 3 Fe 5 O 12 (n = 0) sample (36.8 nm in particle size) calcined at 700°C. The heat generation mechanism changed from superparamagnetic to ferrimagnetic due to particle growth at 700°C for the n = 0 sample, because the heat generation ability (W·g ¹1) depended on the cube of the magnetic field. A mixed SmFeO 3 phase acted as an impurity for depression of the particle growth for the Y 3 Fe 5 O 12 particles. The heat generation ability was slightly improved by the addition of SmFeO 3 and the maximum value was 0.48 W·g ¹1 in an AC magnetic field (370 kHz, 1.77 kA·m ¹1 ) for n = 0.2 and 0.4 samples. The maximum heat generation ability was decreased for the excessive SmFeO 3 mixed sample (n = 0.6). The calcination temperature for the formation of the ferrimagnetic material was increased by the SmFeO 3 addition due to the depression of particle growth.

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Section: Introductionmentioning

confidence: 99%