%0 Journal Article
%T Effect of the second-order magnetocrystalline anisotropic constant on the magnetization reversal in R2Fe14B magnets<br>R2Fe14B型永磁材料中第二磁晶各向异性常数对反磁化过程的影响
%A Chen Xian-Feng
%A <br>陈宪锋
%J 物理学报
%D 2005
%I 
%X 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 Hmin n is found in the temperature range from 20 K to room temperature.
%K second-order magnetocrystalline anisotropy constant
%K nucleation field
%K coercivit y<br>第二磁晶各向异性常数
%K 形核场
%K 矫顽力
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=A12EC1F86F751A98&yid=2DD7160C83D0ACED&vid=318E4CC20AED4940&iid=5D311CA918CA9A03&sid=04555D009D39477C&eid=D2475312E07964AB&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=11