Effect of the second-order magnetocrystalline anisotropic constant on the magnetization reversal in R2Fe14B magnets | Zendy

Chen Xianfeng | Zendy

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Effect of the second-order magnetocrystalline anisotropic constant on the magnetization reversal in R2Fe14B magnets

Author(s) -

Chen Xianfeng

Publication year - 2005

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.54.3856

Subject(s) - magnetocrystalline anisotropy , coercivity , magnet , isotropy , condensed matter physics , constant (computer programming) , anisotropy , nucleation , magnetization , work (physics) , physics , materials science , field (mathematics) , order (exchange) , magnetic anisotropy , thermodynamics , magnetic field , mathematics , quantum mechanics , finance , computer science , pure mathematics , economics , programming language

In this work, the dependence of the second-order magnetocrystalline anisotropic constant K2 on the minimum nucleation field Hminn has been investigated by the numerical method and the analytical formulation under the second-order approximation. It is found that the contribution of K2 t o H minn is very large at low temperatures for isotropic Pr2Fe14B magnets. Although the value of Hminn for Nd2Fe14B can b e obt ained using the analytical formulation under the first-order approximation, the value of Hminn for Pr2Fe14B is achie ved using the formulation under the second-order approxiamtion. Using the obtained value of Hminn, a good linear relation between coercivity and Hminn is found in the temperature range from 20 K to room temperature.

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