SrFe_(12)O_(19)/α-Fe纳米复合双层膜的微磁学模拟  

Micromagnetic simulation of SrFe_(12)O_(19)/α-Fe nanocomposite bilayer films

作　　者：贾立颖 朱代漫 胡国辉 熊君 揣丹 高俊彦[2] 王倩[2] 刘荣明 李炳山[1,2] JIA Li-ying ZHU Dai-man HU Guo-hui XIONG Jun CHUAI-Dan GAO Jun-yan WANG Qian LIU Rong-ming LI Bing-shan(BGRIMM Magnetic Materials ~ Technology （Fuyang） Co. Ltd. , Fuyang 236000, Anhui, China National Engineering Research Center for Magnetic Materials,Beijing 102600, China)

机构地区：[1]北矿磁材(阜阳)有限公司,安徽阜阳236000 [2]国家磁性材料工程技术研究中心,北京102600

出　　处：《金属功能材料》2017年第5期22-26,共5页Metallic Functional Materials

基　　金：国家自然科学基金资助项目资助(51401023);北京矿冶研究总院重大研发计划项目资助(YJZ-2015-03);北京市丰台区科技三项费项目资助(KSF201709)

摘　　要：采用微磁学模拟软件OOMMF详细研究了软磁相厚度对SrFe_(12)O_(19)/α-Fe纳米复合双层膜体系磁性能的影响。结果显示,固定硬磁相厚度10nm,随着软磁相厚度(Ls)的增加,体系由完全耦合的单相反转行为转变为软磁相部分优先形核的两相反转行为,并表现出显著的剩磁增强效应,矫顽力逐渐降低;最大磁能积随着软磁相厚度的增加,先增大后减小,并在Ls=5nm时取得峰值,达到165.57kJ/m^3,远远超过目前单相高性能铁氧体的最大磁能积40kJ/m^3。The effect of soft magnetic phase thicknesses on the magnetic properties of SrFe（12）O（19）/α-Fe bilayer films was investigated by using micromagnetic simulation software OOMMF.The result shows that when fixing the hard magnetic phase thickness as 10 nm,the system changes from fully coupled single-phase reversal behavior into twophase reversal behavior,the remanence increases and the coercivity decreases with the increase of the thickness of soft phase（Ls）.Moreover,the maximum magnetic energy product increases first,and then decreases,and reaches the peak value 165.57 kJ/m^3 when Lsequals 5 nm,which is far beyond the largest energy products（40 kJ/m^3）of single phase high-performance SrFe（12）O（19）.

关 键 词：纳米复合双层膜 微磁学模拟 磁能积 磁反转 

分 类 号：TB383.2[一般工业技术—材料科学与工程]