Abstract
Current–voltage and resistivity–voltage measurements have been made on donor-doped BaTiO3 ceramics in order to investigate the nature of the current transport processes. It is found that the characteristics of the current–voltage do not follow the Heywang model [Solid-State Electron. 3, 51 (1961)]. Hence, the classical Heywang model is modified and the thermionic emission model with smoothly changed barrier resulted from image force is suggested. The modified theory coincides better with the experimental observation. The dependence between current density and voltage is J=J0 exp[−(φ0−βV1/2)/kT]. The relationship between resistivity and voltage (voltage effect) is ρ=(2kT/dJ0β)V1/2 exp[(φ0−βV1/2)/kT . From the modified model, the maximum barrier height of BaTiO3 ceramics can be deduced experimentally as well.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: 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.
