Three-and two-dimensional calculations for the interface anisotropy dependence of magnetic properties of exchange-spring Nd2Fe(14)B/α-Fe multilayers with out-of-plane easy axes

作     者：Qian Zhao Xin-Xin He Francois-Jacques Morvan Guo-Ping Zhao Zhu-Bai Li 赵倩;何鑫鑫;李文瀚;赵国平;李柱柏

作者机构：Inner Mongolia Key Laboratory for Utilization of Bayan Obo Multi-Metallic ResourcesElected State Key LaboratoryDepartment of Applied PhysicsCollege of ScienceInner Mongolia University of Science and TechnologyBaotou 014010China Ningbo Institute of Industrial TechnologyChinese Academy of SciencesNingbo 315201China College of Physics and Electronic EngineeringSichuan Normal UniversityChengdu 610066China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2020年第29卷第3期

页      面：389-395页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：Project supported by the National Key Research and Development Program of China(Grant No.2016YFB0700900) the National Natural Science Foundation of China(Grant Nos.51571126 and 51861030) the Inner Mongolia Autonomous Region Natural Science Foundation of China(Grant No.2019MS01002) the Inner Mongolia Innovative Research Team of China(Grant No.3400102) 

主　　题：micromagnetics interface anisotropy Nd2Fe(14)B/α-Fe multilayers magnetic properties 

摘      要：Hysteresis loops,energy products and magnetic moment distributions of perpendicularly oriented Nd2Fe(14)B/α-Fe exchange-spring multilayers are studied systematically based on both three-dimensional(3D)and one-dimensional(1D)micromagnetic methods,focused on the influence of the interface *** calculated results are carefully compared with each *** interface anisotropy effect is very palpable on the nucleation,pinning and coercive fields when the soft layer is very ***,as the soft layer thickness increases,the pinning and coercive fields are almost unchanged with the increment of interface anisotropy though the nucleation field still monotonically *** interface anisotropy decreases the maximum energy products and increases slightly the angles between the magnetization and applied *** magnetic moment distributions in the thickness direction at various applied fields demonstrate a progress of three-step magnetic reversal,i.e.,nucleation,evolution and irreversible motion of the domain *** above results calculated by two models are in good agreement with each ***,the in-plane magnetic moment orientations based on two models are *** 3D calculation shows a progress of generation and disappearance of vortex state,however,the magnetization orientations within the film plane calculated by the 1D model are *** results suggest that negative interface anisotropy is necessarily avoided experimentally.