Enhancement in the electrical transport properties of CaMnO La/Dy co-doping for improved thermoelectric performance.

The untiring endeavour towards green energy is a trending research among the research community. Thermoelectric materials are of vital importance here owing to their emission-free operation. As a righteous candidate, calcium manganate materials are being explored to increase its figure of merit.

Investigation into defect chemistry and relaxation processes in niobium doped and undoped SrBiTiO using impedance spectroscopy.

The aurivillius family of compounds SrBiTiO (SBTi) and SrBiTiNbO has been prepared using solid state reaction techniques. The niobium doping enhances the value of the dielectric constant, but decreases the phase transition temperature and grain size of SBTi. Grain conductivity evaluated from the impedance data reveals that Nb doping increases the resistance of grains which indicates the decrease in oxygen vacancies.