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Defect structure and formation of defect complexes in Cu2+-modified metal oxides derived from a spin-Hamiltonian parameter analysis

Eichel, Rüdiger-A. ; Drahus, Michael D. ; Jakes, Peter ; Erünal, Ebru ; Erdem, Emre ; Parashar, Sandeep Kumar ; Kungl, Hans ; Hoffmann, Michael J. (2009)
Defect structure and formation of defect complexes in Cu2+-modified metal oxides derived from a spin-Hamiltonian parameter analysis.
In: Molecular Physics, 107 (19)
doi: 10.1080/00268970903084920
Article, Bibliographie

Abstract

The nearest neighbour oxygen octahedron about copper functional centres in metal oxides has been systematically studied by means of electron paramagnetic resonance (EPR) spectroscopy. In particular, the determined g||zz and ACu||zz spin-Hamiltonian parameters were analysed, finding linear dependences as a function of chemical bonding and local distortion of the oxygen octahedron. Moreover, through the introduction of a dimensionless coordination parameter ξ, different defect structures with respect to the number of coordinated oxygen vacancies may be distinguished. This allows for a distinct assignment of defect complexes between the copper functional centre with one or two oxygen vacancies.

Item Type: Article
Erschienen: 2009
Creators: Eichel, Rüdiger-A. ; Drahus, Michael D. ; Jakes, Peter ; Erünal, Ebru ; Erdem, Emre ; Parashar, Sandeep Kumar ; Kungl, Hans ; Hoffmann, Michael J.
Type of entry: Bibliographie
Title: Defect structure and formation of defect complexes in Cu2+-modified metal oxides derived from a spin-Hamiltonian parameter analysis
Language: English
Date: September 2009
Journal or Publication Title: Molecular Physics
Volume of the journal: 107
Issue Number: 19
DOI: 10.1080/00268970903084920
Abstract:

The nearest neighbour oxygen octahedron about copper functional centres in metal oxides has been systematically studied by means of electron paramagnetic resonance (EPR) spectroscopy. In particular, the determined g||zz and ACu||zz spin-Hamiltonian parameters were analysed, finding linear dependences as a function of chemical bonding and local distortion of the oxygen octahedron. Moreover, through the introduction of a dimensionless coordination parameter ξ, different defect structures with respect to the number of coordinated oxygen vacancies may be distinguished. This allows for a distinct assignment of defect complexes between the copper functional centre with one or two oxygen vacancies.

Uncontrolled Keywords: ferroelectrics, defect structure, copper doping, oxygen vacancy, defect dipole
Additional Information:

SFB 595 Cooperation A2, B1

Divisions: DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > A - Synthesis > Subproject A2: Manufacturing and characterization of PZT-ceramics with defined defect chemistry
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > B - Characterisation > Subproject B1: EPR-Investigations of defects in ferroelectric ceramic material
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > A - Synthesis
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > B - Characterisation
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue
Zentrale Einrichtungen
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
DFG-Collaborative Research Centres (incl. Transregio)
Date Deposited: 21 Jul 2011 08:54
Last Modified: 05 Mar 2013 09:51
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