使用微悬臂梁和脉冲磁场的高频电子自旋共振系统。
High-frequency electron spin resonance system using a microcantilever and a pulsed magnetic field.
作者信息
Ohmichi E, Mizuno N, Kimata M, Ohta H, Osada T
机构信息
Graduate School of Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan.
出版信息
Rev Sci Instrum. 2009 Jan;80(1):013904. doi: 10.1063/1.3069287.
A novel technique of high-frequency electron spin resonance (ESR) in a pulsed magnetic field is presented. Our technique is based on the magnetic detection of a magnetization change associated with the ESR absorption using a microcantilever. We successfully observed ESR signals of a microcrystal (mass approximately 1 microg) in the millimeter-wave region up to 130 GHz in pulsed magnetic fields of up to 2.4 T. This result corresponds to the spin sensitivity of approximately 10(11) spins/G, which is four orders of magnitude better than that of conventional transmission-type ESR techniques.
本文提出了一种在脉冲磁场中进行高频电子自旋共振（ESR）的新技术。我们的技术基于使用微悬臂梁对与ESR吸收相关的磁化变化进行磁检测。我们成功地在高达2.4 T的脉冲磁场中，在高达130 GHz的毫米波区域观察到了微晶体（质量约为1微克）的ESR信号。该结果对应的自旋灵敏度约为10(11) 自旋/高斯，比传统传输型ESR技术的灵敏度高四个数量级。
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