A high-frequency electron paramagnetic resonance spectrometer for multi-dimensional, -frequency and -phase pulsed measurements

Abstract

We describe instrumentation for a high-frequency electron paramagnetic resonance (EPR) and pulsed electron-electron double resonance (PELDOR) spectroscopy. The instrumentation is operated in the frequency range of 107$-$120 GHz and 215$-$240 GHz and in the magnetic field range of 0$-$12.1 Tesla. The spectrometer consisting of a high-frequency high-power solid-state source, a quasioptical system, a phase-sensitive detection system, a cryogenic-free superconducting magnet and a ${}^4$He cryostat enables multi-frequency continuous-wave EPR spectroscopy as well as pulsed EPR measurements with a few hundred nanosecond pulses. Here we discuss the details of the design and the pulsed EPR sensitivity of the instrumentation. We also present performance of the instrumentation in unique experiments including PELDOR spectroscopy to probe correlations in an insulating electronic spin system and application of dynamical decoupling techniques to extend spin coherence of electron spins in an insulating solid-state system.

21 pages including 7 figures

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• Dynamical decoupling and noise spectroscopy with a superconducting flux qubit
• Quenching Spin Decoherence in Diamond through Spin Bath Polarization
• Decoherence in Crystals of Quantum Molecular Magnets
• Coherent Manipulation and Decoherence of S=10 Single-Molecule Magnets
• A multi-frequency high-field pulsed EPR / ENDOR spectrometer
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Cited by in corpus (1)

• High-frequency and high-field optically detected magnetic resonance of nitrogen-vacancy centers in diamond