Dielectric Relaxation Measurements in the Protonic Conductors SrCeO3 and SrZrO3

Dielectric relaxation spectroscopy has been applied to the protonic conductors SrCeo~,5Yboo503~a and SrZro,5Yoo50,,. In both systems two different types of relaxation peaks were observed which are characteristic of the wet (proton containing) and dry (proton fiee) state of the samples. They correspond to peaks found by mechanical relaxation. This shows that the defects underlying the relaxation mechanism possess both an electric and an elastic dipole moment thus giving rise to both dielectric and mechanical relaxation.