Abstract
Variable range hopping (VRH) conduction of the Mott type, where the electrical resistivity (ρ) follows the law (ln(ρ)∝T1/4), is observed in Strontium (Sr) doped Calcium Copper Titanate (CCTO) ceramics below 170 K at different frequency values up to 1 MHz. Two different methods of a) minimizing the percentage deviation between experimental data of ρ and equation (ρ=ρoexp(ToT)p) with the exponent p varying between zero to 1 and b) of analyzing the local activation energy (Eloc(T)) are used to confirm the Mott-VRH mechanism in these ceramics. The effect of frequency on the pre-exponential factor ρo, the localization temperature To and thus on the localization length ξ of charge carriers is analyzed.
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.