Fractal Dimension Behaviour of Maze Domain Pattern in Ferrite-Garnet Films During Magnetisation Reversal

Zigert, Alexander D.; Дунаева, Галина Григорьевна; Semenova, E.M.; Иванова, А. И.; Karpenkov, Alexander Yu.; Sdobnyakov, N.Yu.

doi:10.1007/s10948-022-06301-w

Cited by 3 publications

(1 citation statement)

References 24 publications

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“…E. M. Semenova determined the fractal dimension of the atomic force microscopy image of Sm(CoCuFe) 5 alloy at different scales, while the average fractal dimension is practically the same [21]. A. D. Zigert established a relationship between the magnetic state (demagnetized state, partially magnetized by the external field) and the fractal dimension of the changed magnetic domain structure of ferrite garnet magnetic films [22]. Recently, we revealed the relationship between the fractal dimension and the coercivity of permanent magnets through the complex microstructural information of the fractal surface [23].…”

Section: Introductionmentioning

confidence: 99%

Relationship between Remanence and Micromorphology of Nd-Fe-B Permanent Magnets Revealed by Fractal Theory and EBSD Data

et al. 2023

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Remanence is an important parameter of magnetic property for Nd-Fe-B magnets, and high remanent magnetization is a prerequisite for high-performance magnets. In this paper, the surface morphology perpendicular to the texture orientation direction and parallel to the texture orientation direction is analyzed by Nd-Fe-B permanent magnets with different compositions. For the first time, the relationship between the remanence of a magnet and the degree of texture orientation is explained in depth using the fractal dimension. The fractal dimension of surface morphology combined with the remanence equation yields the degree of texture orientation of the magnet, which is in agreement with the trend of the squareness factor of the demagnetization curves. Among the three samples, the Nd-Fe-B sample has the highest degree of texture orientation, the Pr-Nd-Fe-B sample has the lowest degree of texture orientation, and the Nd-Ce-Fe-B sample is in between the first two. The multiples of uniform (pole) density obtained by EBSD further prove the correctness of the degree of texture orientation calculated by the fractal dimension. The combination of EBSD morphology and fractal dimension to obtain novel insights into the correlation between remanence and the degree of texture orientation will contribute to the development of high-performance Nd-Fe-B with high remanence.

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Section: Introductionmentioning

confidence: 99%

Relationship between Remanence and Micromorphology of Nd-Fe-B Permanent Magnets Revealed by Fractal Theory and EBSD Data

et al. 2023

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Fractal Analysis of Magneto-Optical Visualization of the Remagnetization of a Permanent Magnet in a Pulsed Field

Zigert,

Kuz’min,

Sdobnyakov

et al. 2023

Bull. Russ. Acad. Sci. Phys.

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Fractal analysis of magneto-optical visualization of the remagnetization of a permanent magnet in a pulsed field

Zigert,

Kuz’min,

Sdobnyakov

et al. 2023

Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ

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The results of fractal analysis of images of the surface of a permanent magnet KS37, obtained by the method of the polar Kerr effect using an indicator bismuth-containing ferrite-garnet film after magnetization reversal by a pulsed field of 0.1–1.5 T, are presented. The obtained dependences of the residual magnetization on the magnitude of the external pulsed field are compared with the fractal dimension of the magneto-optical images of the magnet surface after exposure to the pulsed field. It is shown that the maximum value of the fractal dimension corresponds to the demagnetized state of the magnet.

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Fractal Dimension Behaviour of Maze Domain Pattern in Ferrite-Garnet Films During Magnetisation Reversal

Cited by 3 publications

References 24 publications

Relationship between Remanence and Micromorphology of Nd-Fe-B Permanent Magnets Revealed by Fractal Theory and EBSD Data

Relationship between Remanence and Micromorphology of Nd-Fe-B Permanent Magnets Revealed by Fractal Theory and EBSD Data

Fractal Analysis of Magneto-Optical Visualization of the Remagnetization of a Permanent Magnet in a Pulsed Field

Fractal analysis of magneto-optical visualization of the remagnetization of a permanent magnet in a pulsed field

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