Measurement of electron paramagnetic resonance using terahertz time-domain spectroscopy.
Measurement of electron paramagnetic resonance using terahertz time-domain spectroscopy.
复制标题
使用太赫兹时域光谱测量电子顺磁共振。
作者：
Kohei Kozuki;T. Nagashima;M. Hangyo
提出了一种基于太赫兹时域光谱的频域电子自旋共振（ESR）测量系统。利用交叉极化器技术提高了探测顺磁体弱ESR信号的灵敏度。顺磁体弱ESR信号是由磁子能级间的磁偶极跃迁引起的。我们证明了在高达10 T的磁场下，具有g因子单轴各向异性的顺磁性五水硫酸铜（II）的ESR信号的测量。对于具有单轴各向异性的粉末样品，所获得的ESR信号的线形与理论预测吻合得很好。
We present a frequency-domain electron spin resonance (ESR) measurement system using terahertz time-domain spectroscopy. A crossed polarizer technique is utilized to increase the sensitivity in detecting weak ESR signals of paramagnets caused by magnetic dipole transitions between magnetic sublevels. We demonstrate the measurements of ESR signal of paramagnetic copper(II) sulfate pentahydrate with uniaxial anisotropy of the g-factor under magnetic fields up to 10 T. The lineshape of the obtained ESR signals agrees well with the theoretical predictions for a powder sample with the uniaxial anisotropy.