LIMITS OF COMPLEX IMPEDANCE SPECTROSCOPY IN IONIC CONDUCTOR THIN-FILM MEASUREMENTS

The complex impedance spectra of thin films of ion conducting glasses are limited in their frequency range; low and high limits occur due to contribution of parts of the experimental system. At low frequencies the spectra reflect the blocking effect of the electrodes used. At high frequencies the spectra are affected by the electrical test circuit. We report here on impedance spectra measurements on the ion conducting glass BLiO2 which exhibit these limits. The limits are discussed by analyzing the corresponding equivalent circuit.