纳米复相永磁材料交换耦合作用的评述  

Review on Exchange Coupling Interaction of Nanocomposite Permanent Magnet Materials

作　　者：弭弘尧 张颖隆 李冰蕾 冯运莉 Mi Hongyao;Zhang Yinglong;Li Binglei;Feng Yunli(North China University of Science and Technology,Tangshan 063210,China;Zhejiang Industry Polytechnic College,Shaoxing 312000,China)

机构地区：[1]华北理工大学,河北唐山063210 [2]浙江工业职业技术学院,浙江绍兴312000

出　　处：《稀有金属材料与工程》2022年第11期4323-4332,共10页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51974134);河北省科技重大专项(21281008Z)。

摘　　要：对比纳米复相永磁材料一维到三维的不同交换耦合作用模型,交换耦合作用会抑制软磁相的磁化反转,不同交换耦合作用模型对矫顽力影响不同。Henkel曲线δM峰值越高表明晶粒间交换耦合作用越强,一阶翻转曲线(first order reversal curve,FORC)相互作用峰值增高对应交换耦合作用增强。纳米复相永磁材料有效各向异性K_(eff)随晶粒尺寸减小而下降,当晶粒尺寸一定时,软磁相体积分数越高K_(eff)越低。为了得到最大磁能积高并且K_(eff)不低的纳米复相永磁材料,软磁相晶粒尺寸应在10 nm左右,软磁相体积分数不能超过50%。Compared with different exchange coupling models of one-dimensional to three-dimensional nanocomposite permanent magnet materials,exchange coupling will inhibit the magnetization reversal of soft magnetic phase,and different exchange coupling models have different effects on coercivity.The higherδM peak of Henkel curve indicates the stronger exchange coupling between grains.The increase of interaction peak of first-order reversal curve(FORC)corresponds to the enhancement of exchange coupling.The effective anisotropy K_(eff)of nanocomposite permanent magnet decreases with the decrease of grain size.When the grain size is constant,the higher the volume fraction of soft magnetic phase is,the lower the K_(eff)is.In order to obtain nanocomposite permanent magnetic materials with high maximum energy product,the grain size of soft magnetic phase should be about 10 nm,and the volume fraction of soft magnetic phase should not exceed 50%.

关 键 词：交换耦合 纳米复相永磁 Henkel曲线 一阶翻转曲线 有效各向异性 

分 类 号：TM273[一般工业技术—材料科学与工程]