Investigation of Mn-doped sodium-potassium niobate ((K,Na) NbO3) ceramics by EPR and impedance spectroscopic methods


Kaftelen H., Kanar D. E. , Repp S., Weber S., Erdem E.

FERROELECTRICS, vol.494, no.1, pp.11-18, 2016 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 494 Issue: 1
  • Publication Date: 2016
  • Doi Number: 10.1080/00150193.2016.1120052
  • Journal Name: FERROELECTRICS
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.11-18

Abstract

The effects of Mn-doping on the conductivity and the oxidation state were investigated for (K,Na)NbO3 ceramics with stoichiometric, and 2mol % A-site and B-site excess compositions. From electron paramagnetic resonance (EPR) and impedance spectroscopy we found that Mn is located at the Nb-site with the oxidation state 2+ and, due to the generation of oxygen vacancies, Mn-doping reduces the conductivity in (K,Na)NbO3 ceramics.