High‐sensitivity broadband microwave spectroscopy with small nonresonant coils
High‐sensitivity broadband microwave spectroscopy with small nonresonant coils
复制标题
具有小型非谐振线圈的高灵敏度宽带微波光谱
DOI：
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发表时间：
1986
期刊：
影响因子：
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通讯作者：
K. Baberschke
中科院分区：
文献类型：
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作者：
H. Mahdjour;W. Clark;K. Baberschke
本文介绍了一种微米尺度的非共振小线圈作为宽带电子自旋共振（ESR）谱仪的微波磁场结构。该线圈由工作在0.1和8.5 GHz之间的宽带微波发生器驱动。样品可填充线圈至约100%。结果表明，对于小尺寸样品，该系统提供了更高的灵敏度比传统的腔光谱仪。因为系统是宽带的，所以可以使用频率扫描或常规磁场扫描来遍历共振。DPPH和使用这种方法的自旋玻璃AgMn的实例报告。由于样品线圈很小，因此它有许多潜在的应用，例如插入稀释冰箱或高压池的混合室，在ENDOR和其他双共振实验中有效使用功率，以及从脉冲ESR实验中的瞬态快速恢复。
The use of a small, nonresonant, coil of μm dimensions as the microwave magnetic field structure of a broadband electron‐spin‐resonance (ESR) spectrometer is described. The coil is driven by a broadband microwave generator which operates between 0.1 and 8.5 GHz. The samples may fill the coil to approximately 100%. It is shown that for small size samples this system offers higher sensitivity than a conventional cavity spectrometer. Because the system is broadband, either frequency scans or the conventional magnetic field scans can be used to traverse the resonance. Examples for DPPH and for the spin glass AgMn using this method are reported. Since the sample coil is small, it has many potential applications, such as insertion into the mixing chamber of a dilution refrigerator or high‐pressure cell, efficient use of power in ENDOR and other double resonance experiments, and rapid recovery from transients in pulsed ESR experiments.