纳米复合Nd2Fe14B/αFe磁体中晶粒的随机各向异性

山东大学学报(工学版)

纳米复合Nd2Fe14B/αFe磁体中晶粒的随机各向异性

孙建刚，杨武

山东大学物理与微电子学院，山东济南250100

收稿日期:2006-05-08 修回日期:1900-01-01 出版日期:2006-08-24 发布日期:2006-08-24
通讯作者: 孙建刚

SUN Jiangang,YANG Wu

School of Physics & Microelectronics,Shandong University,Jinan 250100,China

Received:2006-05-08 Revised:1900-01-01 Online:2006-08-24 Published:2006-08-24
Contact: SUN Jiangang

摘要/Abstract

摘要： 以Nd2Fe14B/αFe为例，研究了球状纳米晶粒尺寸对复合磁性材料有效随机各向异性的影响. 结果表明，材料的有效随机各向异性常数〈Keff〉随软磁性晶粒尺寸Ds的增加而减小，随硬磁性晶粒尺寸Dh的增加而增大.要使复合磁性材料获得较大的各向异性(矫顽力),Ds应尽量减小(10?nm左右), Dh尽量增大.为使材料具有高的磁能积,Dh应大于10?nm, Ds在10?nm左右. 关键词：有效随机各向异性；纳米晶粒；纳米复合材料；交换耦合相互作用

关键词: 有效随机各向异性, 纳米晶粒, 纳米复合材料, 交换耦合相互作用

Abstract: The effects of grain size on the random anisotropy constant 〈Keff〉 in Nd2Fe14B/αFe nanocomposite magnet have been investigated. The results show that 〈Keff〉 of the magnet decreases with the increase of the size of soft magnetic grain (Ds) and the decrease of the size of hard one (Dh), and if the magnet wants to obtaind bigger random anisotropy, Ds should decrease to 10 nm or so and Dh should increase as far as possible, and if the magnet expects to have higher magnetic energy product, Dh should be bigger than 10 nm and Ds should be 10 nm or so.

Key words: nanograin, nanocomposite magnetic material, exchangecoupling interaction , effective random anisotropy

孙建刚,杨武 . 纳米复合Nd2Fe14B/αFe磁体中晶粒的随机各向异性[J]. 山东大学学报(工学版), 2006, 36(4): 88-90 .

SUN Jiangang,YANG Wu . SUN Jiangang,YANG Wu[J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2006, 36(4): 88-90 .

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