High-field/high-frequency EPR of paramagnetic functional centers in Cu2+- and Fe3+-modified polycrystalline Pb[ZrxTi1-x]O3 ferroelectrics

被引:43
作者
Eichel, RA
Mestric, H
Dinse, KP
Ozarowski, A
van Tol, J
Brunel, LC
Kungl, H
Hoffmann, MJ
机构
[1] Tech Univ Darmstadt, Eduard Zintl Inst, D-64287 Darmstadt, Germany
[2] Florida State Univ, Natl High Magnet Field Lab, Ctr Interdisciplinary Magnet Resonance, Tallahassee, FL 32310 USA
[3] Univ Karlsruhe, Inst Ceram Mech Engn, D-76131 Karlsruhe, Germany
关键词
lead zirconate titanate; PZT; copper-; iron doping; oxygen vacancies; charge compensation; morphotropic phase boundary; high-field/high-frequency EPR; g-anisotropy;
D O I
10.1002/mrc.1696
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
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. Copyright (c) 2005 John Wiley & Sons, Ltd.
引用
收藏
页码:S166 / S173
页数:8
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