摘要
以微磁学理论为基础,利用OOMMF软件采用三维动力学模型模拟研究了Sm-Co/α-Fe/Sm-Co交换耦合三层膜体系的磁滞回线,并对其磁性能分别与软、硬磁层厚度的关系进行了系统的分析。研究结果表明:只有当软磁层厚度小于其临界尺寸(5 nm)时,磁滞回线近似为矩形,此时三层膜完全耦合;硬磁层的厚度对体系的磁性能也有着密切的关系,而且硬磁层的厚度对体系软磁相的临界尺寸也有着一定的影响,只有在合适的软、硬磁含量比例的情况下才能得到具有最佳磁性能的三层膜。
Using micromagnetic theory, a three-mem- brane system Sm-Co/α-Fe/Sm-Co exchange coupling hysteresis loop was simuluted by three-dimensional dynamic model OOMMF software. The relationship between the soft magnetic properties and the hard magnetic layer thickness of the system was analyzed systematically. The results showed that only when the soft layer thickness was less than the critical size （5 nm） , the hysteresis loop was approximately rectangular, and three-layer film at this time was fully coupled. And the hard magnetic layer thickness on the magnetic system also had a close relation. The hard magnetic layer thickness also had some influence on the critical size of soft magnetic phase system; only in the appropriate soft and hard magnetic content was available to get the proportion of cases with the best magnetic properties of the three films.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2011年第5期528-532,共5页
Journal of the Chinese Society of Rare Earths
基金
山西省自然科学基金(2008011042-2)资助
关键词
微磁学
纳米复合永磁
交换耦合
磁性能
稀土
mieromagnetic
nanocomposite permanent
exchange coupling
magnetic properties
rare earths
