Afel/2B1/203 (A- Ba, Sr, Ca; B-Nb, Ta, Sb) ceramics were synthesized and temperature dependencies of the dielectric permittivity were measured at different frequencies. The experimental data obtained show very high values of the dielectric permittivity in a wide temperature interval that is inherent to so-called high-k materials. The analyses of these data establish a Maxwell-Wagner mechanism as a main source for the phenomenon observed.
Citation: Physical Review B (Condensed Matter and Materials Physics)
Pub Type: Journals
ceramics, dielectric permittivity, ferroelectricity, perovskites