title: Analyzing the defect structure of CuO-doped PZT and KNN piezoelectrics from electron paramagnetic resonance.
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 (Cu(Nb)'''-V(O)··) and trimeric (V(O)··-Cu(Nb)'''-V(O)··)· defect complexes with 180° and non-180° domain walls has been analyzed and compared to the effects from (Cu'' - V(O)··)(x)× dipoles in CuO-doped lead zirconate titanate (PZT). Attempts are made to relate the rearrangement of defect complexes to macroscopic electromechanical properties.
authors.forename: Peter
authors.initials: P
authors.lastname: Jakes
authors.forename: Hans
authors.initials: H
authors.lastname: Kungl
authors.forename: Roland
authors.initials: R
authors.lastname: Schierholz
authors.forename: Rüdiger-A
authors.initials: RA
authors.lastname: Eichel