Frequency-domain magnetic resonance spectroscopy

Abstract A novel method to study high-frequency electron spin resonance is introduced, which sweeps the frequency at fixed magnetic fields. We describe the main features of our frequency-domain spectrometer, which works in the spectral range from 30 GHz to 1.5 THz and at magnetic fields up to 8 T; the temperature can be as low as 0.5 K. Applications include the investigations of paramagnetic ions, in general, and molecular magnets, in particular.