一台多频高场脉冲电子顺磁共振/电子-核双共振光谱仪。

A multifrequency high-field pulsed electron paramagnetic resonance/electron-nuclear double resonance spectrometer.

作者信息

Morley Gavin W, Brunel Louis-Claude, van Tol Johan

机构信息

Center for Interdisciplinary Magnetic Resonance, National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32310, USA.

出版信息

Rev Sci Instrum. 2008 Jun;79(6):064703. doi: 10.1063/1.2937630.

DOI:10.1063/1.2937630

PMID:18601425

Abstract

We describe a pulsed electron paramagnetic resonance spectrometer operating at several frequencies in the range of 110-336 GHz. The microwave source at all frequencies consists of a multiplier chain starting from a solid state synthesizer in the 12-15 GHz range. A fast p-i-n-switch at the base frequency creates the pulses. At all frequencies a Fabry-Perot resonator is employed and the pi/2 pulse length ranges from approximately 100 ns at 110 GHz to approximately 600 ns at 334 GHz. Measurements of a single crystal containing dilute Mn(2+) impurities at 12 T illustrate the effects of large electron spin polarizations. The capabilities also allow for pulsed electron-nuclear double resonance (ENDOR) experiments as demonstrated by Mims ENDOR of (39)K nuclei in Cr:K(3)NbO(8).

摘要

我们描述了一种在110 - 336GHz范围内多个频率下运行的脉冲电子顺磁共振光谱仪。所有频率的微波源均由一个从12 - 15GHz范围内的固态合成器开始的倍频链组成。基频处的快速p-i-n开关产生脉冲。在所有频率下均采用法布里-珀罗谐振器，π/2脉冲长度范围从110GHz时的约100ns到334GHz时的约600ns。在12T磁场下对含有稀锰（II）杂质的单晶进行的测量说明了大电子自旋极化的影响。这些功能还允许进行脉冲电子-核双共振（ENDOR）实验，如在Cr:K(3)NbO(8)中对（39）K核进行的米姆斯ENDOR实验所证明的那样。