High Pressure ESR System with Double-Stacked Dielectric Resonators –Its Application to the Polymerization of the TDAE–C60 Organic Ferromagnet–

We present the ESR system with dielectric resonators for performing the high-pressure measurements. This system is constructed by combining the diamond anvil cell (or sapphire anvil cell) with the double-stacked dielectric resonators, which are commercially available. The maximum pressure is obtained to be about 15 kbar and this high-pressure ESR system holds its availability from room temperature to Liq. He temperature. This system has a potential to perform ESR measurements under high-pressure with high accuracy. As an example, we show its application to the polymerization in the TDAE–C 60 organic ferromagnet under high pressure.