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Article

Calculation of Three-dimensional Energy Product for Isotropic Nd2Fe14B Magnet

1
Powder Materials Division, Korea Institute of Materials Science, Changwon 51508, Korea
2
Center for X-ray Optics, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
3
Department of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea
*
Authors to whom correspondence should be addressed.
Academic Editors: Erika Ottaviano, Jose Machado, Katarzyna Antosz, Dariusz Mazurkiewicz, Yi Ren, Pierluigi Rea, Rochdi El Abdi, Marina Ranga, Vijaya Kumar Manupati and Emilia Villani
Appl. Sci. 2022, 12(15), 7887; https://doi.org/10.3390/app12157887
Received: 21 June 2022 / Revised: 1 August 2022 / Accepted: 3 August 2022 / Published: 5 August 2022
(This article belongs to the Topic Advanced Systems Engineering: Theory and Applications)
A conventional energy product calculated by the product of the B-field and the H-field is not sufficient for representing the performance of a magnet because it considers the homogeneous and only the uniaxial magnetic properties of the magnet. The conventional energy product has been compared with another energy product obtained by integrating the scalar product of the B-field and the H-field of each cell composed of the three-dimensional components. We investigated a model system by micromagnetic simulation using finite differential method (FDM) and calculated the full hysteresis of the magnet. The model system of a Nd2Fe14B magnet composed of grains with a diameter of about 100 nm was assumed. In the case of the isotropic multi-grain magnet, the energy product calculated by the integration method was 28% larger than the energy product obtained by the conventional way, although a discrepancy between the distribution of the magnetizations and the demagnetizing fields at the reversal process resulted in the decrease of the energy product. View Full-Text
Keywords: permanent magnet; energy product; micromagnetic simulation; multidomain reversal permanent magnet; energy product; micromagnetic simulation; multidomain reversal
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MDPI and ACS Style

Kim, N.; Han, H.-S.; Choi, C.-J.; Lee, K.-S.; Park, J. Calculation of Three-dimensional Energy Product for Isotropic Nd2Fe14B Magnet. Appl. Sci. 2022, 12, 7887. https://doi.org/10.3390/app12157887

AMA Style

Kim N, Han H-S, Choi C-J, Lee K-S, Park J. Calculation of Three-dimensional Energy Product for Isotropic Nd2Fe14B Magnet. Applied Sciences. 2022; 12(15):7887. https://doi.org/10.3390/app12157887

Chicago/Turabian Style

Kim, Namkyu, Hee-Sung Han, Chul-Jin Choi, Ki-Suk Lee, and Jihoon Park. 2022. "Calculation of Three-dimensional Energy Product for Isotropic Nd2Fe14B Magnet" Applied Sciences 12, no. 15: 7887. https://doi.org/10.3390/app12157887

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