Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioèlektroniki (Jun 2019)
ELECTRICAL-PHYSICAL AND DIELECTRIC PROPERTIES OF Pb<sub>0,85</sub>Zr<sub>0,53</sub>Ti<sub>0,47</sub>O<sub>3</sub> - Sr<sub>2</sub>FeMoO<sub>6-</sub><sub>δ </sub>COMPOSITES
Abstract
Ferromagnetic-ferroelectric composite materials on the base of Pb0.85Zr0.53Ti0.47O3-Sr2FeMoO6-δ (PZT-SFMO) compound have been prepared by a complex ceramic technology and the citrate-gel synthesis. It was determined that the dielectric permittivity of a sample with a content of PZT of 55 wt. % and SFMO of 45 wt. % increases with temperature due to the rise of electrical conductivity and an influence of the dielectric dispersion caused by the Maxwell-Wagner relaxation. The electrical conductivity of the sample with a content of PZT of 35 wt. % and a content of SFMO of 65 wt. % possesses a clearly expressed frequency dependence, at temperature lower than 600 K, whereas at higher temperatures the electrical conductivity almost does not depends on frequency in the range 20 Hz-1 MHz. This is concerned with a considerable decrease of critical frequency at higher temperatures. At frequencies higher than 100 kHz and temperature lower than 600 K, the electrical conductivity increases by a power law.
