Ultra-low frequency EPR using longitudinal detection and fictitious-field modulation.
Ultra-low frequency EPR using longitudinal detection and fictitious-field modulation.
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DOI:
10.1016/j.jmr.2020.106855
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发表时间:
2020-12
期刊:
影响因子:
--
通讯作者:
Garwood M
中科院分区:
文献类型:
--
作者:
Tang X;Suddarth S;Qian G;Garwood M
When viewed in a rotating frame of reference, a transverse-plane radiofrequency (RF) field manifests as a longitudinal field component called the fictitious field. By modulating the RF field and thus the fictitious field, detectable longitudinal magnetization patterns have previously been shown to be measurable. By combining fictitious-field modulation and longitudinal detection, here we demonstrate EPR spectroscopy and one-dimensional imaging in a custom-built longitudinal detection system operating at an ultra-low frequency (24 MHz) for detecting electron spins with short (~nanoseconds) relaxation times. Simultaneous transmit and receive with low transmitter leakage level (~80 dB isolation) is also demonstrated.
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