Broadband impedance spectroscopic characterization of PbTiO3 crystal grown by spontaneous crystallization from molten oxides. Issue 9 (July 2016)

• Record Type: Journal Article
• Authors: Vinnik, D.A.; Zherebtsov, D.A.; Gudkova, S.A.; Niewa, R.; Zabeivorota, N.S.; Podgornov, F.V.
• Is Part Of: Ceramics international. Volume 42:Issue 9(2016)
• Page Start: 10787
• Page End: 10792
• Publication Date: 2016-07
• Subjects: A. Inorganic compounds -- A. Piezoelectric materials -- B. Crystal growth; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2016.03.206
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Tetragonal lead titanate PbTiO3 single crystals were grown by spontaneous crystallization from a lead and boron oxide flux and investigated by impedance spectroscopy in the broadband frequency range (10 −3 –5×10 6 Hz) along the crystallographic a and c axes at room temperature. Three polarization relaxation modes as well as electric conductivity processes were revealed. In the ultralow frequency range (<10 Hz), the relaxation processes were assigned to the electrode and the ferroelectric domains polarizations. In the high frequency range (10 5 Hz), the relaxation process arises from the crystal lattice polarizations. The electric conduction of the investigated crystals is determined by two fundamental effects – ionic and hopping conductivities. In addition, the anisotropies of relative dielectric constant (300) as well as DC conductivity (1.8×10 −9 S/m) were estimated.