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Tunable metamaterial response of a Ni_(80)Fe_(20) antidot lattice for spin waves

机译：Ni_（80）Fe_（20）解毒点阵对自旋波的可调谐超材料响应

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摘要

All-electrical spin-wave spectroscopy and frequency-resolved magneto-optical Kerr-effect measurements are combined to study spin waves propagating through a magnetic antidot lattice nanopatterned from a Ni_(80)Fe_(20) thin film. Spin waves are injected from a plain film into the antidot lattice and the transmission across the interface is explored in detail for different wavelengths. We find that spin waves with a wavelength much greater than the lattice periodicity are not described well by recently discussed approaches. Instead the spin-wave dispersion is consistent with an effective magnetization smaller than the saturation magnetization measured on the unstructured ferromagnetic material. Consistently, we find that the transmission coefficients are modeled well by assuming an effectively continuous metamaterial for spin waves characterized by the reduced magnetization. The experimental data and interpretation are substantiated theoretically using the plane-wave method and micromagnetic modeling. The results are interesting for the development of frequency-selective mirrors in magnonics through lateral nanopatterning.
机译：结合全电自旋波光谱学和频率分辨的磁光Kerr效应测量，以研究通过以Ni_（80）Fe_（20）薄膜为纳米图案的磁性解毒点阵传播的自旋波。从平膜中将自旋波注入到解毒剂点阵中，并针对不同波长详细研究了穿过界面的透射率。我们发现，最近讨论的方法不能很好地描述波长远大于晶格周期性的自旋波。相反，自旋波色散与小于在非结构化铁磁材料上测得的饱和磁化强度的有效磁化强度一致。一致地，我们发现通过为磁化强度降低的自旋波假设有效连续的超材料，可以很好地模拟传输系数。使用平面波方法和微磁建模从理论上证实了实验数据和解释。该结果对于通过横向纳米图案化的马诺尼克频率选择镜的开发很有趣。

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  • 来源
    《Physical review》 |2011年第18期|p.184411.1-184411.11|共11页
  • 作者

    S.Neusser; H. G. Bauer; G. Duerr; R. Huber; S. Mamica; G. Woltersdorf; M. Krawczyk; C. H. Back; D. Grundler;

  • 作者单位

    Lehrstuhl fuer Physik funktionaler Schichtsysteme, Technische Universitat Munchen, Physik Department, James-Franck-Str. 1,D-85747 Garching b. Muenchen, Germany;

    Institut fuer Experimentelle und Angewandte Physik, Universitaet Regensburg, D-93040 Regensburg, Germany;

    Lehrstuhl fuer Physik funktionaler Schichtsysteme, Technische Universitat Munchen, Physik Department, James-Franck-Str. 1,D-85747 Garching b. Muenchen, Germany;

    Lehrstuhl fuer Physik funktionaler Schichtsysteme, Technische Universitat Munchen, Physik Department, James-Franck-Str. 1,D-85747 Garching b. Muenchen, Germany;

    Surface Physics Division, Faculty of Physics, Adam Mickiewicz University, Umultowska 85, PL-Poznan 61-614, Poland;

    Institut fuer Experimentelle und Angewandte Physik, Universitaet Regensburg, D-93040 Regensburg, Germany;

    Surface Physics Division, Faculty of Physics, Adam Mickiewicz University, Umultowska 85, PL-Poznan 61-614, Poland;

    Institut fuer Experimentelle und Angewandte Physik, Universitaet Regensburg, D-93040 Regensburg, Germany;

    Lehrstuhl fuer Physik funktionaler Schichtsysteme, Technische Universitat Munchen, Physik Department, James-Franck-Str. 1,D-85747 Garching b. Muenchen, Germany;

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  • 关键词

    dynamic properties (dynamic susceptibility, spin waves, spin diffusion, dynamic scaling, etc.); ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance; spin waves;

    机译：动态特性（动态磁化率;自旋波;自旋扩散;动态缩放等）;铁磁;反铁磁和亚铁磁谐振;自旋波共振自旋波;

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