物理学报Issue(22)：227502-1-227502-11,11.DOI:10.7498/aps.62.227502
易轴取向对Nd2Fe14B/α-Fe双层膜退磁过程影响的微磁学分析
Micromagnetic analysis of the effect of the easy axis orientation on demagnetization process in Nd2Fe14B/α-Fe bilayers
摘要
Abstract
The hysteresis loops and energy products in the magnetization reversal process are investigated by one-and three-dimensional micromagnetic methods for a Nd2Fe14B/α-Fe bilayer system with an angleβbetween the applied field and the easy axis, and the results are compared with available experimental results. The calculation shows that the deviation of the easy axis affects the magnetization reversal process seriously. When β=0◦, there is no obvious nucleation in the magnetization reversal process. The remanence decreases asβdecreases, and the squareness of the hysteresis loops is weakened, leading to the sharp decrease of energy product. For Nd2Fe14B(10 nm)/α-Fe(8 nm), the energy product decreases by 30.3%whenβ=10◦. In the magnetization reversal process, as the total energy reaches the maxium, Zeeman energy decreases with increasing ofβ, and the exchange energy first increases and then decreases slightly, and the anisotropic energy increases with the increasing ofβ. The deviation of easy axis has a greater influence on the energy product of the bilayer system with larger soft thickness. The out-of-plane deviation of easy axis has a similar effect.关键词
微磁学模拟/磁晶易轴/磁能积/能量Key words
micromagnetic simulation/easy axes/energy products/energy引用本文复制引用
夏静,张溪超,赵国平..易轴取向对Nd2Fe14B/α-Fe双层膜退磁过程影响的微磁学分析[J].物理学报,2013,(22):227502-1-227502-11,11.基金项目
国家自然科学基金(批准号:11074179)和四川省高等学校科研创新团队建设计划(批准号:12TD008)资助的课题.*Project supported by the National Natural Science Foundation of China (Grant No.11074179) and the Construction Plan for Scientific Research Inno-vation Teams of Institution of Higher Education of Sichuan Province, China (Grant No.12TD008) （批准号:11074179）
