A multi-frequency high-field pulsed EPR / ENDOR spectrometer

Abstract

We describe a pulsed multi-frequency 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 PIN-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 ~100 ns at 110 GHz to ~600 ns at 334 GHz. Measurements of a single crystal containing dilute Mn2+ impurities at 12 T illustrate the effects of large electron spin polarizations. The capabilities also allow for pulsed electron nuclear double resonance experiments as demonstrated by Mims ENDOR of 39K nuclei in Cr:K3NbO8.

5 pages, 6 figures

References in corpus (2)

• Efficient Dynamic Nuclear Polarization at High Magnetic Fields
• Coherent manipulation of electron spins up to ambient temperatures in Cr${}^{5+}$(S=1/2) doped K${}_3$NbO${}_8$

Cited by in corpus (18)

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• Spin-Orbit Coupling Fluctuations as a Mechanism of Spin Decoherence
• Anisotropy of the molecular magnet V${}_{15}$ spin Hamiltonian detected by high-field electron spin resonance
• Dynamic nuclear polarization with simultaneous excitation of electronic and nuclear transitions