Defect structure and materials “hardening” in Fe2O3-doped [Bi0.5Na0.5]TiO3 ferroelectrics

Aksel, Elena; Erdem, Emre; Jakes, Peter; Jones, Jacob L.; Eichel, Rüdiger-A.
July 2010
Applied Physics Letters;7/5/2010, Vol. 97 Issue 1, p012903
Academic Journal
The effect of Fe2O3-doping on the defect structure and piezoelectric properties of [Bi0.5Na0.5]TiO3 ceramics is studied by means of electron paramagnetic resonance spectroscopy. The results show that the Fe3+ functional centers are incorporated at the perovskite B-site, and clearly can be attributed to the formation of (FeTi′–VO••)• defect complexes with charge compensating oxygen vacancies. Correspondingly, they act as acceptors which promotes materials “hardening.”


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