力检测的高频电子自旋共振光谱使用磁铁安装纳米膜：热磁化调制的鲁棒检测
Force-detected high-frequency electron spin resonance spectroscopy using magnet-mounted nanomembrane: robust detection of thermal magnetization modulation
摘要：
在这项研究中，我们报告了一个概念新颖的宽带高频电子自旋共振（HFESR）光谱技术。与检测饱和效应引起的磁化强度变化的普通测力ESR技术不同，该方法测量共振时样品温度变化引起的磁化强度变化。为了证明其原理，我们开发了一种基于氮化硅纳米膜的力检测ESR谱仪，它可以在高磁场下稳定工作。对具有不同自旋弛豫时间的样品进行测试测量。在15 T磁场和636 GHz频率下，我们成功地获得了一个没有明显频谱失真的无缝ESR谱。得到了高自旋灵敏度的$10^{12}$ ~spins/G $\cdot$ s，与自旋弛豫时间无关。这些结果表明，该技术可以作为一种实用的方法，在研究领域的HFESR技术是适用的。
英文摘要：
In this study, we report a conceptually novel broadband high-frequency electron spin resonance (HFESR) spectroscopic technique. In contrast to the ordinary force-detected ESR technique, which detects the magnetization change due to the saturation effect, this method measures the magnetization change due to the change of the sample temperature at resonance. To demonstrate its principle, we developed a silicon nitride nanomembrane-based force-detected ESR spectrometer, which can be stably operated even at high magnetic fields. Test measurements were performed for samples with different spin relaxation times. We succeeded in obtaining a seamless ESR spectrum in magnetic fields of 15~T and frequencies of 636~GHz without significant spectral distortion. A high spin sensitivity of $10^{12}$~spins/G$\cdot$s was obtained, which was independent of the spin relaxation time. These results show that this technique can be used as a practical method in research fields where the HFESR technique is applicable.
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