The use of ferroelectric material for increasing the sensitivity of EPR spectrometers

Abstract

Abstract To increase the sensitivity of the EPR spectrometers, the use of ferroelectric material (considered as additional resonator) is proposed. This new technique is examined on CW EPR spectrometer RE-1307 and on home-built Pulse EPR spectrometer, both at X-band. When ferroelectric resonator made from KTaO3 is used, signal-to-noise ratio in CW experiments is increased by factor of 10, while in electron spin echo experiment the incident power may be reduced by factor of 50 to obtain the same power on the sample. Frequency values are calculated for rectangular and cylindrical ferroelectric resonators. Key Words: ferroelectric resonatorCW EPRPulse EPRsensitivity