Ferromagnetic resonance investigation in permalloy magnetic antidot arrays on alumina nanoporous membranes
Ferromagnetic resonance investigation in permalloy magnetic antidot arrays on alumina nanoporous membranes
复制标题
氧化铝纳米多孔膜上坡莫合金磁性反点阵列的铁磁共振研究
DOI：
10.1016/j.jmmm.2013.09.009
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发表时间：
2014
影响因子：
2.7
通讯作者：
C. Aliaga
中科院分区：
文献类型：
--
作者：
R. L. Rodríguez;J. L. Palma;E. Burgos;S. Michea;J. Escrig;J. Denardin;C. Aliaga
利用铁磁共振技术研究了模板辅助法制备的孔径为18和70 nm的Ni 80 Fe 20反点阵列的磁性能。通过改变孔直径来调谐反点阵列使得能够控制铁磁共振场的角度依赖性。扫描电子显微镜图像揭示了一个相当规则的六边形排列的孔，然而，共振场的角度依赖性不表现出预期的六重对称性，这种对称性。在一个完美的六方晶格上进行的微磁模拟，当与我们的真实的系统从扫描显微镜图像相比，显示在反点晶格中的缺陷的存在影响铁磁共振场的对称性。
The magnetic properties of Ni80Fe20antidot arrays with hole diameters of 18 and 70 nm fabricated by a template-assisted method were investigated using the ferromagnetic resonance technique. Tuning the antidot arrays by changing the hole diameter enables control on the angular dependence of the ferromagnetic resonance field. The scanning electron microscope images reveal a quite regular hexagonal arrangement of the pores, however the angular dependence of the resonance field do not exhibit the six-fold symmetry expected for this symmetry. Micromagnetic simulations performed on a perfect hexagonal lattice, when compared with those made on our real system taken from the scanning microscope images, reveal that the presence of defects in the antidot lattice affects the ferromagnetic resonance field symmetry.