Journal Article

FZJ-2013-02892

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Interactions of defect complexes and domain walls in CuO-doped ferroelectric (K,Na)NbO3123

Eichel, R.-A. (Corresponding author)FZJ* ; Erünal, E. ; Jakes, P.FZJ* ; Körbel, S. ; Elsässer, C. ; Kungl, H.FZJ* ; Acker, J. ; Hoffmann, M. J.

2013
American Institute of Physics Melville, NY

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Please use a persistent id in citations: http://hdl.handle.net/2128/17355  doi:10.1063/1.4811268

Abstract: “Lead-free” piezoelectric sodium potassium niobate has been studied with respect to its defect structure when doping with CuO. The results indicate that two kinds of mutually compensating charged defect complexes are formed, (Cu′′′Nb−VO••)′ and (VO••−Cu′′′Nb−VO••)•. Concerning the interplay of these defect complexes with the piezoelectric materials properties, the trimeric (VO••−Cu′′′Nb−VO••)• defect complex primarily has an elastic dipole moment and thus is proposed to impact the electromechanical properties, whereas the dimeric (Cu′′′Nb−VO••)′ defect possesses an electric dipole moment in addition to an elastic distortion. Both types of defect complexes can impede domain-wall motion and may contribute to ferroelectric “hardening.”

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Contributing Institute(s):

1. Grundlagen der Elektrochemie (IEK-9)

Research Program(s):

1. 152 - Renewable Energies (POF2-152) (POF2-152)
2. 123 - Fuel Cells (POF2-123) (POF2-123)

Appears in the scientific report 2013

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Database coverage:
; ; Allianz-Lizenz / DFG ; Current Contents - Social and Behavioral Sciences ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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