双主相Nd-Fe-B/Ce-Fe-B周期多层膜磁性能的微磁学模拟研究  

Micro-magnetic simulation on the magnetic properties of double-main-phase Nd-Fe-B/Ce-Fe-B periodic multilayer

作　　者：何经纬 周刚 饶光辉[1] HE Jingwei;ZHOU Gang;RAO Guanghui(School of Materials Science and Engineering,Guilin University of Electronic Technology,Guilin 541004,China)

机构地区：[1]桂林电子科技大学材料科学与工程学院,广西桂林541004

出　　处：《桂林电子科技大学学报》2022年第4期324-332,共9页Journal of Guilin University of Electronic Technology

基　　金：国家重点基础研究发展计划(2014CB643703)。

摘　　要：为了提高永磁薄膜的磁性能以及提高Ce元素的利用率,基于微磁学理论,采用OOMMF软件对双主相Nd_(2)Fe_(14)B/Ce_(2)Fe_(14)B周期多层膜的磁化反转过程进行了模拟,系统地研究了磁化反转过程中磁层厚度和多层膜层数对周期多层膜磁性能的影响,分析了体系的剩磁、矫顽力、磁滞回线和磁化反转过程中的能量变化以及磁体的矫顽力机制,为日后制备高含量Ce的高性能磁体提供参考。研究结果表明:当固定多层膜厚度和层数不变时,随着磁层厚度的增加,体系的矫顽力和最大磁能积均逐渐减小;周期多层膜的矫顽力机制主要由成核主导;在其他条件相同时,平行取向的周期多层膜的矫顽力和磁能积均优于垂直取向的周期多层膜;周期多层膜总厚度的增加会降低取向对矫顽力的影响。研究结果将有助于加深对双主相Nd-Fe-B/Ce-Fe-B磁体磁化反转机理的认识,为将来在实验中优化永磁薄膜的磁性能提供参考。In order to improve the magnetic properties of permanent magnetic films and increase the utilization of Ce elements,the magnetization reversal process of the dual main phaseCe_(2)Fe_(14)B/Ce_(2)Fe_(14)B periodic multilayer film has been simulated,and the influence of the thickness of the magnetic layer and the number of layers of the multilayer film on the magnetic properties of the periodic multilayer film during the magnetization reversal process has been systematically studied.The remanence,coercivity,hysteresis loop of the system and the energy change during the magnetization reversal process and the magnet are analyzed.The coercive force mechanism will provid a certain reference for the preparation of high-performance magnets with high Ce content in the future.The research results show that when the thickness of the fixed multilayer film is constant and the number of the fixed multilayer film is constant,with the increase of the thickness of the magnetic layer,the coercive force and maximum magnetic energy product of the system gradually decrease;The coercive force mechanism is mainly dominated by nucleation;when other conditions are the same,the coercivity and magnetic energy product of the parallel-oriented periodic multilayer film are better than those of the perpendicularly-oriented periodic multilayer film;the total thickness of the periodic multilayer film increases Will reduce the influence of orientation on coercivity.The research results will help to deepen understand the magnetization reversal mechanism of the dual-phase Nd-Fe-B/Ce-Fe-B magnets,and provide a certain reference for optimizing the magnetic properties of permanent magnet films in future experiments.

关 键 词：微磁学模拟 双主相 Nd-Fe-B/Ce-Fe-B周期多层膜 磁性能 

分 类 号：TB34[一般工业技术—材料科学与工程]