Investigation on magnetic properties of orientated nanocomposite Pr2Fe14B/α-Fe permanent magnets by micromagnetic finite-element method

He, Song; Zhang, Hongwei; Rong, Chuanbing; Chen, Juan; Sun, J. R.; Shen, Biao

doi:10.1016/j.jmmm.2012.06.034

Cited by 6 publications

(1 citation statement)

References 29 publications

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“…In order to reveal the relationship between the microstructure and macroscopic magnetic properties, it is important to have a method at hand which allows for the fast and efficient scanning of the multidimensional parameter space required to characterize magnetic nanocomposites. Micromagnetic computationsmainly adopting the meanwhile standard finite-element approach based on tetrahedral finite elements-have been employed for understanding, for example, the coercivity mechanism in Nd−Fe−B magnets [10][11][12][13][14][15][16][17][18][19]. In this paper, we report on high-throughput simulations of the magnetic microstructure of nanocrystalline Nd−Fe−B using our new polyhedron-based micromagnetic paradigm, which combines the advantage of a highly flexible meshing with the speed of an FFT-based evaluation of the magnetodipolar field [20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Towards understanding of magnetization reversal in Nd–Fe–B nanocomposites: analysis by high-throughput micromagnetic simulations

Erokhin

Berkov

Ito

et al. 2018

J. Phys.: Condens. Matter

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We demonstrate how micromagnetic simulations can be employed in order to characterize and analyze the magnetic microstructure of nanocomposites. For the example of nanocrystalline Nd-Fe-B, which is a potential material for future permanent-magnet applications, we have compared three different models for the micromagnetic analysis of this material class: (i) a description of the nanocomposite microstructure in terms of Stoner-Wohlfarth particles with and without the magnetodipolar interaction; (ii) a model based on the core-shell representation of the nanograins; (iii) the latter model including a contribution of superparamagnetic clusters. The relevant parameter spaces have been systematically scanned with the aim to establish which micromagnetic approach can most adequately describe experimental data for this material. According to our results, only the last, most sophisticated model is able to provide an excellent agreement with the measured hysteresis loop. The presented methodology is generally applicable to multiphase magnetic nanocomposites and it highligths the complex interrelationship between the microstructure, magnetic interactions, and the macroscopic magnetic properties.

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Section: Introductionmentioning

confidence: 99%

Towards understanding of magnetization reversal in Nd–Fe–B nanocomposites: analysis by high-throughput micromagnetic simulations

Erokhin

Berkov

Ito

et al. 2018

J. Phys.: Condens. Matter

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The influence of milling and annealing conditions on the structural and magnetic behavior of Nd2Fe14B/α-Fe hard/soft magnetic nanocomposites

Gutoiu

Isnard

Chicinaş

et al. 2015

Journal of Alloys and Compounds

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Micromagnetic simulations with periodic boundary conditions: Hard-soft nanocomposites

Wysocki

Antropov

2017

Journal of Magnetism and Magnetic Materials

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We developed a micromagnetic method for modeling magnetic systems with periodic boundary conditions along an arbitrary number of dimensions. The main feature is an adaptation of the Ewald summation technique for evaluation of long-range dipolar interactions. The method was applied to investigate the hysteresis process in hard-soft magnetic nanocomposites with various geometries. The dependence of the results on different micromagnetic parameters was studied. We found that for layered structures with an out-of-plane hard phase easy axis the hysteretic properties are very sensitive to the strength of the interlayer exchange coupling, as long as the spontaneous magnetization for the hard phase is significantly smaller than for the soft phase. The origin of this behavior was discussed. Additionally, we investigated the soft phase size optimizing the energy product of hard-soft nanocomposites.

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Investigation on magnetic properties of orientated nanocomposite Pr2Fe14B/α-Fe permanent magnets by micromagnetic finite-element method

Cited by 6 publications

References 29 publications

Towards understanding of magnetization reversal in Nd–Fe–B nanocomposites: analysis by high-throughput micromagnetic simulations

Towards understanding of magnetization reversal in Nd–Fe–B nanocomposites: analysis by high-throughput micromagnetic simulations

The influence of milling and annealing conditions on the structural and magnetic behavior of Nd2Fe14B/α-Fe hard/soft magnetic nanocomposites

Micromagnetic simulations with periodic boundary conditions: Hard-soft nanocomposites

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