Title :
Analyzing the defect structure of CuO-Doped PZT and KNN piezoelectrics from electron paramagnetic resonance
Author :
Jakes, Peter ; Kungl, Hans ; Schierholz, Ragnar ; Eichel, Rüdiger A.
Author_Institution :
Inst. fur Energie- und Klimaforschung (IEK-9), Forschungszentrum Julich, Julich, Germany
Abstract :
The defect structure for copper-doped sodium potassium niobate (KNN) ferroelectrics has been analyzed with respect to its defect structure. In particular, the interplay between the mutually compensating dimeric (CuNb-VO) and trimeric (VO-CuNb-VO) defect complexes with 180° and non-180° domain walls has been analyzed and compared to the effects from (Cu - VO)x× dipoles in CuO-doped lead zirconate titanate (PZT). Attempts are made to relate the rearrangement of defect complexes to macroscopic electromechanical properties.
Keywords :
copper; copper compounds; electric domain walls; ferroelectric materials; ferroelectricity; lead compounds; paramagnetic resonance; piezoelectric materials; piezoelectricity; PZT:CuO; copper-doped sodium potassium niobate ferroelectrics; defect structure; dimeric defect complexes; domain walls; doped lead zirconate titanate; electron paramagnetic resonance; macroscopic electromechanical properties; piezoelectrics; trimeric defect complexes; Ceramics; Dielectrics; Doping; Geometry; Niobium; Strain;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
DOI :
10.1109/TUFFC.2014.3058
