Influence of Interlayer Thickness on High-Frequency Magnetic Properties of FeCoSiN/AlO/FeCoSiN Trilayers
Influence of Interlayer Thickness on High-Frequency Magnetic Properties of FeCoSiN/AlO/FeCoSiN Trilayers
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DOI：
10.1109/tmag.2011.2154376
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发表时间：
2011-09
影响因子：
2.1
通讯作者：
Feng Xu;Z. Liao;Qijun Huang;C. Ong;Shandong Li
中科院分区：
文献类型：
--
作者：
Feng Xu;Z. Liao;Qijun Huang;C. Ong;Shandong Li
基于Landau-Lifshitz-吉尔伯特方程，研究了溅射态FeCoSiN/AlO/FeCoSiN三层薄膜的静态磁性能和高频磁导率谱，并讨论了它们与AlO中间层厚度的关系.磁滞回线表明，在3 ~ 10 nm的厚度范围内，中间层有效地降低了三层薄膜的介电常数。渗透率谱拟合得到的有效各向异性场随夹层厚度的增加而增大，直至饱和。阻尼因子对夹层厚度的依赖性存在极大值。这是由于在较厚的层间范围内的Néel耦合和较薄的层间范围内的强铁磁耦合。
In this paper, we investigate the static magnetic properties and high-frequency permeability spectra of as-sputtered FeCoSiN/AlO/FeCoSiN trilayer films and discuss their dependences on the thickness of AlO interlayer, based on the phenomenological Landau-Lifshitz-Gilbert equation. The hysteresis loops show that the interlayer effectively decreases the coercivities of trilayers in the thickness range between 3 and 10 nm. The effective anisotropy field obtained from the fitting of permeability spectra increases with the interlayer thickness to saturation. The dependence of damping factor on the interlayer thickness has a maximum. It is attributed to the Néel couplings at the thicker interlayer range and the strong ferromagnetic couplings at the thinner interlayer range.