论文标题
低温频域电子自旋共振光谱仪基于共面波导和现场调制
Cryogenic frequency-domain electron spin resonance spectrometer based on coplanar waveguides and field modulation
论文作者
论文摘要
我们提出了一种基于共面波导和场调制的频域电子自旋共振（ESR）实验的仪器。频率（最多25 GHz），磁场（最多8 t）和温度（低至1.6 K）的大参数空间可访问。我们在DPPH（2,2-二苯基-1-苯羟基苯基）上进行了实验，作为校准现场调制以及碳纤维样品的标准，以估计仪器的整体灵敏度。在低温温度下，有或没有场调制的红宝石样品在较大的频率和场范围内的光谱记录。该比较揭示了通过现场调制实现的信噪比的提高。
We present an instrument to perform frequency-domain electron spin resonance (ESR) experiments that is based on coplanar waveguides and field modulation. A large parameter space in frequency (up to 25 GHz), magnetic field (up to 8 T), and temperature (down to 1.6 K) is accessible. We performed experiments on DPPH (2,2-diphenyl-1-picrylhydrazyl) as a standard to calibrate the field modulation as well as on a carbon fibre sample to estimate the overall sensitivity of the instruments. Spectra of a ruby sample in a broad frequency- and field range at cryogenic temperatures are recorded with and without field modulation. The comparison reveals the improved signal-to-noise ratio achieved by field modulation.
