Comparative view of coercivity mechanisms in soft and hard magnetic materials

• Autorzy: De Campos Marcos Flavio , De Castro José Adilson

Identyfikatory

DOI

10.24425/aee.2024.152112

• Języki publikacji: EN

Abstrakty

EN

The main differences between soft and hard magnetic materials are commented on. It is discussed how the coercivity mechanisms can be affected by the domain wall energy. A spherical cap nucleus is used for this analysis. There is a competition between magnetostatic energy and domain wall energy terms. As a consequence, for soft magnetic materials, the magnetostatic energy term is dominant over the domain wall energy term. An explanation for the dependence of the coercivity with grain size is presented. For grain size above the single domain size, in hard magnetic materials with high magnetocrystalline anisotropy, the coercivity decreases following a law proportional to the inverse of the square root of the grain size, whereas in soft magnetic materials, the coercivity reduces proportionally to the inverse of grain size.

Słowa kluczowe

EN

coercivity; hard magnetic materials; magnets; soft magnetic materials

• Wydawca: Polish Academy of Sciences, Committee on Electrical Engineering
• Czasopismo: Archives of Electrical Engineering
• Rocznik: 2024
• Tom: Vol. 73, nr 4
• Strony: 1087--1101
• Opis fizyczny: Bibliogr. 52 poz., rys., tab., wykr., wz.

Twórcy

autor

De Campos Marcos Flavio

• PPGEM – EEEIMVR – UFF Universidade Federal Fluminense, Av dos Trabalhadores 420 Vila Santa Cecilia – Volta Redonda RJ 27255-125 – Brazil

• https://orcid.org/0000-0001-8084-1624

autor

De Castro José Adilson

• PPGEM – EEEIMVR – UFF Universidade Federal Fluminense, Av dos Trabalhadores 420 Vila Santa Cecilia – Volta Redonda RJ 27255-125 – Brazil

• https://orcid.org/0000-0001-8054-9236

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