Abstract
This work presents the first systematic study of conductivity characteristics of alkaline earth titanates in the form of polycrystalline and heteroepitaxial thin films as well as nanocrystalline ceramics as a function of temperature (between 600_∘C and 1000_∘C) and continuously adjustable oxygen partial pressures ranging from 10− 20 bar to 1 bar. Compared to the well-known log,σ-log, pO2 profiles of single crystals, the conductivity behavior of CSD-prepared, polycrystalline SrTiO3 thin films with a feature size of about 50 nm differs radically. The most prominent characteristics are a sharp drop under reducing conditions followed by a broad plateau region. Tailored investigations on heteroepitaxial as well as polycrystalline thin films grown by PLD and especially by studies on nanocrystalline BaTiO3 ceramics with a mean grain size of ≤100 nm allowed an unambiguous assignment of the described effects to the nanocrystalline morphology of the samples.
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.