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High-field/high-frequency EPR of paramagnetic functional centers in Cu2+- and Fe3+-modified polycrystalline Pb[ZrxTi1-x]O-3 ferroelectrics

Eichel, R. A.; Mestric, H.; Dinse, K. P.; Ozarowski, A.; van Tol, J.; Brunel, L. C.; Kungl, H.; Hoffmann, M. J.

Abstract:
Copper(II)- and iron(III)-modified Pb[ZrxTi1-x]O-3 ferroelectrics were
investigated by means of highfield/high-frequency EPR. The results
obtained suggest that CU2+ and Fe3+ both substitute as acceptor centers
for [ZrTi](4+). Whereas for the iron-doped system the charge
compensating oxygen vacancies (VO) lead to the formation of charged
(Fe'(Ti)- VO) defect associates, no such associates have been observed
for the copper-modified system. As regards the morphotropic phase
boundary, the model of a mesoscopic mixing of the pure-member phases
has been refined to a picture in which a nanoscale composition
distribution prevails.


Zugehörige Institution(en) am KIT Institut für Keramik im Maschinenbau (IKM)
Publikationstyp Zeitschriftenaufsatz
Jahr 2005
Sprache Englisch
Identifikator ISSN: 0749-1581
KITopen ID: 1000007619
Erschienen in Magnetic Resonance in Chemistry
Band 43
Seiten 166-173
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