摘要
以微磁学理论为基础,详细研究了厚度不变,尺寸和间距的变化对Nd_2Fe_(14)B图形化点阵磁性能和磁反转过程的影响。结果显示,当点阵厚度(20 nm)和间距(30 nm)保持不变,随着点阵半径的增大,矫顽力和交换作用能降低,静磁能逐渐增大,磁化过程由一致反转的单畴态过渡到非一致反转的多畴态;保持点阵厚度(20 nm)和点阵半径(30 nm)不变,随着点阵间距的增大,磁耦合相互作用减弱,矫顽力逐渐增大,当间距增大到40~50 nm时,磁耦合相互作用基本消失,矫顽力基本不再发生变化。
The influence of dot size and distance on the magnetic properties and magnetization reversal process of Nd2Fe14B bit patterned media was investigated based on micromagnetic theory. The result shows that when the dot thickness （20nm） and distance （30nm） remain unchanged, with increasing radius of dots, coercivity and exchange interaction energy reduces, static magnetic energy increases, and magnetization reversal process changes from single domain state of uniform reversal to multi-domain state of nonuniform reversal. When the dot thickness （20nm） and radius （30nm） remain unchanged, magnetic coupled interaction weakens and coercivity increases gradually with increasing the distance of dots. The magnetic coupling interaction vanishes and coercivity is not changed when the distance of dots increases up to 40 to 50 nm.
作者
张军
马建春
武国兴
薛金辉
ZHANG Jun MA Jian-chun WU Guo-xing XUE Jin-hui(Department of Chemistry and Chemical Engineering, Lvliang College, Lvliang 033000, Chin)
出处
《磁性材料及器件》
CAS
2017年第3期1-3,18,共4页
Journal of Magnetic Materials and Devices
