Magnetic States of Two-Phase Synthesized FemOn–Fe3 – xTixO4 Particles: Experimental and Theoretical Analysis

Харитонский, П. В.; Kosterov, Andrei; Gurylev, A.; Гареев, К. Г.; Kirillova, Svetlana; Zolotov, Nikita; Anikieva, Yu. A.

doi:10.1134/s1063783420090139

Cited by 6 publications

(5 citation statements)

References 12 publications

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“…The best results for different C nbsp values (consistent with the experimental values of M rs , M s , H cr , and H c ) were obtained using the characteristic size of ferrimagnetic particles, d p = 20 nm, and the volume of spherical particles, v p = (π/6)•d p 3 , corresponding to it. Two models were used in further calculations: the model of chemically inhomogeneous two-phase particles (TPh model) [58,81,82] and the model of single-domain particles with effective spontaneous magnetization (SDEM model) [83][84][85]. It is known that, at sufficiently large concentrations of the ferrimagnet, magnetization of the sample is significantly affected by magnetostatic interaction between the ferrimagnetic particles, which was taken into consideration in the both models.…”

Section: Theoretical Modelingmentioning

confidence: 99%

Superparamagnetism of Artificial Glasses Based on Rocks: Experimental Data and Theoretical Modeling

Kharitonskii,

Sergienko,

Ralin

et al. 2023

Magnetochemistry

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Artificial glasses containing nanoscale inclusions of iron oxides, including magnetite and hematite, were obtained via the method of the high-temperature melting of rocks. The main factors influencing the magnetic properties of glasses are the composition of the initial charge and the conditions of cooling of the melt. The data of magnetic granulometry and frequency-field dependencies of magnetic susceptibility showed the presence of a sufficiently large superparamagnetic fraction in the samples. Coordinated theoretical modeling using two independent models that take into consideration possible the chemical inhomogeneity of particles and magnetostatic interaction between them made it possible to calculate hysteresis characteristics corresponding to the experiment and to estimate ferrimagnetic concentrations in the samples, including the superparamagnetic fraction.

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Section: Theoretical Modelingmentioning

confidence: 99%

Superparamagnetism of Artificial Glasses Based on Rocks: Experimental Data and Theoretical Modeling

Kharitonskii,

Sergienko,

Ralin

et al. 2023

Magnetochemistry

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“…Composite synthesis based on Fe m O n −TiO 2 system was obtained by depositing magnetite into the powder suspension TiO 2 [3,4]. 4 g FeCl 3 • 6H 2 O and 2 g FeSO 4 • 7H 2 O (molar ratio 2 : 1) were dissolved in 100 ml of distilled water.…”

Section: Materials and Their Magnetic Propertiesmentioning

confidence: 99%

“…For modelled specimens [3,4], the presence of three groups of particles was assumed according to magnetic granulometry, Mössbauer spectroscopy and electronic microscopy data: 1) fraction of chemically heterogeneous two-phase particle composition " magnetite/maghemitetitanomagnetite", 2) weakly magnetic fraction (hematite) and 3) superparamagnetic particles of the first two fractions. Since the average spontaneous magnetization I s 1 of the first fraction is two orders higher than the weakly magnetic ), the two-phase particles should be the primary contribution to the remanence coercivity of M rs samples.…”

Section: Theoretical Modelingmentioning

confidence: 99%

“…Theoretical studies of small ferrimagnetic particles often use the approximation of " noninteracting particles" and the assumption of their chemical uniformity (see, for example, [1,2]). The works of authors of [3,4] studied the synthesized composites Fe 3 O 4 −Fe 3−x Ti x O 4 and showed that it was impossible to reconcile their magnetic properties without taking into account the heterophase of individual particles and the magnetostatic interaction between them.…”

Section: Introductionmentioning

confidence: 99%

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Micromagnetic modeling of Fe-=SUB=-3-=/SUB=-O-=SUB=-4-=/SUB=--Fe-=SUB=-3-x-=/SUB=-Ti-=SUB=-x-=/SUB=-O-=SUB=-4-=/SUB=- composites

Харитонский

Yu.A.

Zolotov

et al. 2022

Physics of the Solid State

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Theoretical modeling of the magnetic properties of Fe3O4-Fe3-xTixO4 composites obtained by the sol-gel method with subsequent hydrothermal treatment has been carried out. The magnetization reversal fields and the number of particles in different magnetic states of an ensemble of two-phase particles with an infinitely thin boundary between the phases and a characteristic size varying in the range from 30 to 80 nm were calculated using the "magnetic rectangles" method. Hysteresis characteristics of an ensemble of chemically inhomogeneous magnetostatically interacting particles were obtained, consistent with experimental data. Keywords: Composites, magnetic granulometry, micromagnetism, two-phase particles, magnetostatic interaction.

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“…They can realize the dual-phase conversion of soft magnetic and permanent magnetic composites with a small amount of excitation energy. They have the advantages of good control and conversion characteristics and save energy, and they have a wide range of application scenarios in regard to power equipment [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Modeling of Dual-Phase Composite Magnetic Material and Its Application in Transformers

Liu,

Yang,

Han

et al. 2024

Energies

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Dual-phase composite magnetic materials have magnetic and permanent magnetic properties. They can realize the dual-phase conversion of soft magnetic and permanent magnetic composites with a small amount of excitation energy. They have the advantages of good control and conversion characteristics and save energy, and they have a wide range of application scenarios in regard to power equipment. In this paper, the magnetization modeling of dual-phase composite magnetic materials is carried out based on micromagnetic theory, and a specific mathematical expression is given. Secondly, the preparation process of the dual-phase composite magnetic material is studied, the dual-phase composite magnetic material is prepared, and the demagnetization curve of the dual-phase composite magnetic material is measured. Finally, the application of dual-phase composite magnetic materials in power equipment is carried out. Using the soft magnetic and permanent magnetic characteristics of dual-phase composite magnetic materials, their impact on DC bias suppression in transformers is assessed. Magnetic circuit reluctance theory is used to develop the structure and electromagnetic design of a transformer. A transformer prototype with DC bias suppression ability based on dual-phase composite magnetic materials is manufactured, and simulation and experimental research are carried out. The simulation and experimental results verify the correctness of the proposed scheme. Although this scheme requires a more complex core structure, the energy-saving effect is remarkable without changing the transformer’s neutral grounding. The indicators meet the actual requirements of the project.

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Magnetic States of Two-Phase Synthesized FemOn–Fe3 – xTixO4 Particles: Experimental and Theoretical Analysis

Cited by 6 publications

References 12 publications

Superparamagnetism of Artificial Glasses Based on Rocks: Experimental Data and Theoretical Modeling

Superparamagnetism of Artificial Glasses Based on Rocks: Experimental Data and Theoretical Modeling

Micromagnetic modeling of Fe-=SUB=-3-=/SUB=-O-=SUB=-4-=/SUB=--Fe-=SUB=-3-x-=/SUB=-Ti-=SUB=-x-=/SUB=-O-=SUB=-4-=/SUB=- composites

Modeling of Dual-Phase Composite Magnetic Material and Its Application in Transformers

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