Abstract
The BaTiO3 perovskite is widely used in the electronic technology due to its dielectric, piezoelectric and ferroelectric properties and is a well-known base for obtaining a promising multifunctional material. In this paper we report the extensive studies on the Co-doped BaTiO3 ceramics for the wide range cobalt content. Full structural characterization of studied samples in a 20–450 K range was provided. The results of research on spectroscopic, dielectric, electronic, optical, magnetic and elastic properties are presented. The superior dielectric properties to those exhibited by the parent compound have been found. Namely, the reduction of dielectric losses and stability of the dielectric permittivity in the vicinity of the room temperature are reported. Additionally, our research revealed: broadening of the dielectric anomalies related to the ferroelectric-paraelectric phase transition, shifting the Curie point towards lower temperatures, displacive mechanism of Curie phase transition with order-disorder contributions; maximum value of the real part of dielectric permittivity of about 5000 at Curie point for 0.05 wt% of Co-doping, value of the activation energy ∼ 0.9 eV as the result of the migration of oxygen vacancies that are generated due to charge compensation, and the occurrence of magnetoelectric response. At last, the Co-doped BaTiO3 shows potential to use in non-linear optoelectronic devices, while no evidence of multiferroic properties, suggested in the literature, was found.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.