| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Advances in Dielectric Materials and Electronic Devices
|
| Presentation Title |
D-6: Investigation of Charge Transport Mechanism in Ba Doped Sr2CrMoO6 Double Perovskite Mixed Ionic Electronic Conductor |
| Author(s) |
Vivek Kumar, Sudha Saini, Tanmoy Maiti |
| On-Site Speaker (Planned) |
Tanmoy Maiti |
| Abstract Scope |
The charge transport and relaxation mechanism in Ba_xSr_(2-x)CrMoO_6 (0<x<0.3) double perovskite has been investigated employing modulus, dielectric and impedance spectroscopy in the frequency range of 0.3 Hz to 5 MHz and in the temperature range of 473-773 K. The impedance fitting response to the microstructure revealed grain and grain boundary capacitance and conductivity, which is found to be thermally triggered and frequency dependent. The complex modulus analysis indicated that both short- and long-range charge transport is responsible for conduction with the non-Debye type response. The dielectric analysis indicated existence of both universalities, near constant loss (NCL) and UDR. Furthermore, from Almond-West (AW) power law, the hopping frequency and migration energy have been calculated. The relaxation time and DC conductivity are found to obey Barton Nakajima and Namikawa's relation. Besides, the Kramers Kronig relation and conductivity scaling are discussed to provide insight into conduction processes in this mixed ionic electronic conductor. |