Open AccessEffect of the second-order magnetocrystalline anisotropic constant on the magnetization reversal in R2Fe14B magnets
Author(s) -
Xianfeng Chen
Publication year - 2005
Publication title -
wuli xuebao
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.