A sub-Kelvin cryogen-free EPR system

作者：Melhuish Simon J^*; Stott Chloe; Ariciu Ana Maria; Martinis Lorenzo; McCulloch Mark; Piccirillo Lucio; Collison David; Tuna Floriana; Winpenny Richard

来源：Journal of Magnetic Resonance, 2017, 282: 83-88.

DOI：10.1016/j.jmr.2017.07.007

• Cryogen-free
• EPR
• Sub-Kelvin

We present an EPR instrument built for operation at Q band below 1 K. Our cryogen-free Dewar integrates with a commercial electro-magnet and bridge. A description of the cryogenic and RF systems is given, along with the adaptations to the standard EPR experiment for operation at sub-Kelvin temperatures. As a first experiment, the EPR spectra of powdered Cr12O9(OH)(3)(O2CMe3)(15) were measured. The sub-Kelvin EPR spectra agree well with predictions, and the performance of the sub-Kelvin system at 5 K is compared to that of a commercial spectrometer.

• 出版日期2017-9