论文标题
使用宽带铁磁共振光谱的存在多个共振对材料参数测定的影响
Influence of the presence of multiple resonances on material parameter determination using broadband ferromagnetic resonance spectroscopy
论文作者
论文摘要
使用数值模拟研究了铁磁共振光谱中多个共振对提取物质参数的影响。我们的结果表明，假设材料的共振数量不正确的系统误差会导致提取物质参数，从而显着偏离任何真实材料参数。当实验性铁磁共振光谱中存在噪声时，增加宽带表征的频率范围可以显着降低误差线，并在分析数据时，假设材料中存在的共振次数正确。对于本研究所研究的病例，发现使用单个共振分析数据会导致提取的旋转磁比和有效的磁化参数，这些参数与真实材料参数的加权平均值一致。我们进一步提供了一个警告性的例子，涉及提取含有未知数的共振数量的材料的不均匀线宽扩展和阻尼参数。
The influence of the presence of multiple resonances in ferromagnetic resonance spectra on extracted material parameters is investigated using numerical simulations. Our results show that the systematic error of assuming an incorrect number of resonances for a material can lead to the extraction of material parameters that significantly deviate from any of the true material parameters. When noise is present in experimental ferromagnetic resonance spectra increasing the frequency range of the broadband characterization can significantly reduce the error-margins when the data is analyzed assuming the correct number of resonances present in the material. For the cases investigated in this study it was found that analyzing the data using a single resonance results in extracted gyromagnetic ratios and effective magnetization parameters that are consistent with the weighted average of the true material parameters. We further provide a cautionary example regarding the extraction of the inhomogeneous linewidth broadening and damping parameters of materials that contain an unknown number of resonances.
