Magnetic Induction Heating of Nano-Sized Ferrite Particle

Zhang, Yi; Zhai, Ya

doi:10.5772/15339

Cited by 15 publications

(10 citation statements)

References 13 publications

(15 reference statements)

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“…The bulk material of this composition is ferromagnetic, while its nanoparticles, smaller than the respective typical magnetic domain, are only superparamagnetic. To compare, Fe 3 O 4 (magnetite) nanoparticles are also superparamagnetic 31 . Thus, the magnetic properties of ferritin depend on superparamagnetic nanoparticles scattered in the polypeptide matrix, while the magnetic properties of hemozoin depend on the heme polymer, with the closest-neighbor Fe 3+ ions interacting via the chemical bonds of the respective porphyrine and polypeptide fragments.…”

Section: Discussionmentioning

confidence: 99%

Superparamagnetic Properties of Hemozoin

Inyushin

Kucheryavih

et al. 2016

Sci Rep

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We report that hemozoin nanocrystals demonstrate superparamagnetic properties, with direct measurements of the synthetic hemozoin magnetization. The results show that the magnetic permeability constant varies from μ = 4585 (at −20 °C) to 3843 (+20 °C), with the values corresponding to a superparamagnetic system. Similar results were obtained from the analysis of the diffusion separation of natural hemozoin nanocrystals in the magnetic field gradient, with μ = 6783 exceeding the value obtained in direct measurements by the factor of 1.8. This difference is interpreted in terms of structural differences between the synthetic and natural hemozoin. The ab initio analysis of the hemozoin elementary cell showed that the Fe3+ ion is in the high-spin state (S = 5/2), while the exchange interaction between Fe3+ electron-spin states was much stronger than kBT at room temperature. Thus, the spin dynamics of the neighboring Fe3+ ions are strongly correlated, lending support to the superparamagnetism.

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Section: Discussionmentioning

confidence: 99%

Superparamagnetic Properties of Hemozoin

Inyushin

Kucheryavih

et al. 2016

Sci Rep

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“…Magnetic resonance losses are primarily induced by domain wall resonance and electron spin resonance [42,46,57]. In the literature, residual losses were also used to represent the losses originating from various magnetic relaxations and resonances which occurs mainly in two ways, as rotational resonance and as domain wall resonance [55,58]. Accordingly, the magnetic resonance loss can be regarded as the residual loss or its components.…”

Section: Microwave Heating Theory and Mechanismsmentioning

confidence: 99%

“…Hysteresis loss is caused by the irreversible magnetization process in the alternating magnetic field [ 55 ]. Thus, hysteresis losses occur only in magnetic materials such as ferrous material, steel, nickel, and a few other metals.…”

Section: Microwave Heating Theory and Mechanismsmentioning

confidence: 99%

Review on Microwave-Matter Interaction Fundamentals and Efficient Microwave-Associated Heating Strategies

2016

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Microwave heating is rapidly emerging as an effective and efficient tool in various technological and scientific fields. A comprehensive understanding of the fundamentals of microwave–matter interactions is the precondition for better utilization of microwave technology. However, microwave heating is usually only known as dielectric heating, and the contribution of the magnetic field component of microwaves is often ignored, which, in fact, contributes greatly to microwave heating of some aqueous electrolyte solutions, magnetic dielectric materials and certain conductive powder materials, etc. This paper focuses on this point and presents a careful review of microwave heating mechanisms in a comprehensive manner. Moreover, in addition to the acknowledged conventional microwave heating mechanisms, the special interaction mechanisms between microwave and metal-based materials are attracting increasing interest for a variety of metallurgical, plasma and discharge applications, and therefore are reviewed particularly regarding the aspects of the reflection, heating and discharge effects. Finally, several distinct strategies to improve microwave energy utilization efficiencies are proposed and discussed with the aim of tackling the energy-efficiency-related issues arising from the application of microwave heating. This work can present a strategic guideline for the developed understanding and utilization of the microwave heating technology.

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“… 40 So-called residual losses being identified specifically as Néel and Brownian relaxations, which are strongly dependent on particle size, shape, agglomeration, etc. 41 …”

Section: Introductionmentioning

confidence: 99%

Yttrium-Doped Iron Oxide Nanoparticles for Magnetic Hyperthermia Applications

et al. 2020

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Magnetic nanoparticles of Fe 3 O 4 doped by different amounts of Y 3+ (0, 0.1, 1, and 10%) ions were designed to obtain maximum heating efficiency in magnetic hyperthermia for cancer treatment. Single-phase formation was evident by X-ray diffraction measurements. An improved magnetization value was obtained for the Fe 3 O 4 sample with 1% Y 3+ doping. The specific absorption rate (SAR) and intrinsic loss of power (ILP) values for prepared colloids were obtained in water. The best results were estimated for Fe 3 O 4 with 0.1% Y 3+ ions (SAR = 194 W/g and ILP = 1.85 nHm 2 /kg for a magnetic field of 16 kA/m with the frequency of 413 kHz). The excellent biocompatibility with low cell cytotoxicity of Fe 3 O 4 :Y nanoparticles was observed. Immediately after magnetic hyperthermia treatment with Fe 3 O 4 :0.1%Y, a decrease in 4T1 cells’ viability was observed (77% for 35 μg/mL and 68% for 100 μg/mL). These results suggest that nanoparticles of Fe 3 O 4 doped by Y 3+ ions are suitable for biomedical applications, especially for hyperthermia treatment.

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Magnetic Induction Heating of Nano-Sized Ferrite Particle

Cited by 15 publications

References 13 publications

Superparamagnetic Properties of Hemozoin

Superparamagnetic Properties of Hemozoin

Review on Microwave-Matter Interaction Fundamentals and Efficient Microwave-Associated Heating Strategies

Yttrium-Doped Iron Oxide Nanoparticles for Magnetic Hyperthermia Applications

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