Time domain measurement of electron spin relaxation at high fields and dynamic nuclear polarization at sub-millimeter wavelengths
Time domain measurement of electron spin relaxation at high fields and dynamic nuclear polarization at sub-millimeter wavelengths
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DOI：
10.1109/mwsym.2017.8058878
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发表时间：
2017-06
期刊：
影响因子：
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通讯作者：
Thierry Dubroca;J. McKay;Xiaoling Wang;J. van Tol
中科院分区：
文献类型：
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作者：
Thierry Dubroca;J. McKay;Xiaoling Wang;J. van Tol
我们描述了一个395 GHz的脉冲电子顺磁共振（EPR）设置，和松弛测量和CW EPR在这些频率的样品中使用的液体和固体的动态核极化（DNP）增强的核磁共振的初步结果。取决于自旋-轨道耦合的量，自旋晶格弛豫在更高的场和频率下变得显著更快，这对于在高场和频率下的一些DNP应用具有后果。我们将讨论在更高频率和场下对DNP和脉冲EPR的（亚）毫米波源和组件的要求，因为在不久的将来将出现更高的磁场。
We describe a 395 GHz pulsed electron paramagnetic resonance (EPR) setup, and initial results of relaxation measurements and cw EPR at these frequencies in samples used for liquid- and solid-state nuclear magnetic resonance enhanced by dynamic nuclear polarization (DNP). Depending on the amount of spin — orbit coupling, the spin lattice relaxation becomes significantly faster at higher fields and frequencies, which has consequences for some DNP applications at high fields and frequencies. We will discuss the requirements for (sub)millimeter-wave sources and components for DNP and pulsed EPR at even higher frequencies and fields, as even higher magnetic fields will become available in the near future.