Experimental realization of linearly polarized x-ray detected ferromagnetic resonance
Experimental realization of linearly polarized x-ray detected ferromagnetic resonance
复制标题
线偏振X射线检测铁磁共振的实验实现
DOI：
10.1088/1367-2630/ac465f
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发表时间：
2022
影响因子：
3.3
通讯作者：
Shafer, P.
中科院分区：
文献类型：
--
作者：
Klewe, C.;Emori, S.;Li, Q.;Yang, M.;Gray, B. A.;Jeon, H-M;Howe, B. M.;Suzuki, Y.;Qiu, Z. Q.;Shafer, P.
我们首次提出了金属和绝缘薄膜中铁磁共振驱动的GHz磁旋进的时间分辨动态X射线磁性线性二向色性（XMLD）测量的理论和实验证据。我们的研究结果表明，动态XMLD在铁磁Ni80Fe20和亚铁磁Ni0.65Zn0.35Al0.8Fe1.2O4为不同的测量几何形状和线性极化。对所观察到的信号的详细分析揭示了分离动态信号中的不同谐波分量的重要性，以便在没有竞争贡献的影响的情况下识别XMLD响应。特别是，RF磁共振electives一个大的动态XMLD响应的基本频率下的实验几何形状与倾斜的X射线偏振。通过分离动态响应的2ω傅立叶分量，可以提高几何范围和实验灵敏度。这些结果说明了动态XMLD的潜力，并代表了一个里程碑式的成就，对GHz的自旋动力学研究系统超越铁磁秩序。
We present the first theoretical and experimental evidence of time-resolved dynamic x-ray magnetic linear dichroism (XMLD) measurements of GHz magnetic precessions driven by ferromagnetic resonance in both metallic and insulating thin films. Our findings show a dynamic XMLD in both ferromagnetic Ni 80 Fe 20 and ferrimagnetic Ni 0.65 Zn 0.35 Al 0.8 Fe 1.2 O 4 for different measurement geometries and linear polarizations. A detailed analysis of the observed signals reveals the importance of separating different harmonic components in the dynamic signal in order to identify the XMLD response without the influence of competing contributions. In particular, RF magnetic resonance elicits a large dynamic XMLD response at the fundamental frequency under experimental geometries with oblique x-ray polarization. The geometric range and experimental sensitivity can be improved by isolating the 2ω Fourier component of the dynamic response. These results illustrate the potential of dynamic XMLD and represent a milestone accomplishment toward the study of GHz spin dynamics in systems beyond ferromagnetic order.