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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Angular dependence of microwave absorption in multilayer films
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Angular dependence of microwave absorption in multilayer films

机译：多层膜中微波吸收的角度依赖性

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摘要

Microwave absorption measurements on a NiFe/Au/NiFe multilayer film were carried out at X-band (8.8-9.8 GHz). The angular dependence of microwave absorption, both in ferromagnetic resonance (FMR) and low-field microwave absorption (LFA), is investigated in two orientations. In both cases the film plane is orientated parallel to the AC field. In the longitudinal orientation, the film axis makes angles between 0 degrees and 90 degrees with the DC magnetic field (H-dc) in the transverse orientation, the film axis is always perpendicular to H-dc, marking angles between 0 degrees to 90 degrees with the axis of the induced transverse anisotropy. For the longitudinal orientation, FMR spectra suggested a compound absorption mode that can be interpreted as the combination of two different magnetic phases. Additionally, these measurements showed an increase in the resonance field as a function of the angle, which can be explained in terms of a contribution of shape anisotropy field (SAF). For this same orientation, the LFA spectra exhibited a compound antisymmetric shape around zero field with double peaks, which we associated with each one of the magnetic phases. The separation of these peaks increased as a function of the angle between the DC field and the multilayer film axis, suggesting also a contribution from SAF. In the transverse orientation, we observed an additional contribution of induced transverse anisotropy field (ITAF) in FMR measurements. The LFA measurements exhibited differences with the longitudinal orientation which are also associated with ITAF.
机译：在X波段（8.8-9.8 GHz）上对NiFe / Au / NiFe多层膜进行微波吸收测量。在两个方向上研究了铁磁谐振（FMR）和低场微波吸收（LFA）中微波吸收的角度依赖性。在这两种情况下，胶片平面的方向都平行于交流场。在纵向方向上，薄膜轴与横向磁场中的直流磁场（H-dc）形成0度至90度之间的角度，薄膜轴始终垂直于H-dc，标记角度在0度至90度之间与诱导的横向各向异性的轴。对于纵向取向，FMR光谱提出了一种复合吸收模式，可以将其解释为两种不同磁性相的组合。此外，这些测量结果表明共振场随角度的变化而增加，这可以用形状各向异性场（SAF）的作用来解释。对于相同的方向，LFA光谱在零场附近显示出具有双峰的复合反对称形状，我们将其与每个磁相相关联。这些峰的分离随着DC场与多层膜轴之间的夹角的增加而增加，这也暗示了SAF的贡献。在横向方向上，我们在FMR测量中观察到了感应横向各向异性场（ITAF）的其他贡献。 LFA测量值显示出与纵向方向的差异，这也与ITAF有关。

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