CORUNDUM-FILLED RESONATOR SYSTEMS FOR HIGH-PRESSURE AND LOW-TEMPERATURE ELECTRON-PARAMAGNETIC-RESONANCE STUDIES

A cylindrical corundum-filled resonator of the TE(112)-type in the mic rowave X band, coupled to a coaxial line, is used in two systems desig ned for the high-pressure, low-temperature electron paramagnetic reson ance (EPR) studies, The first one is used up to 800 MPa and over a tem perature range of 80-400 K. The second permits EPR measurements down t o 4 K in the pressure range below 400 MPa. Pressure and temperature ca n be simultaneously varied and controlled with the high accuracy neede d to study spectral anomalies in the vicinity of the phase transitions in solids. (C) 1996 American Institute of Physics.