Local symmetry-reduction in tetragonal (La, Fe)-codoped Pb[Zr0.4Ti0.6]O3 piezoelectric ceramics

被引：30

作者：

Erdem, Emre ^{[1
]}

Eichel, Ruediger-A ^{[1
]}

Kungl, Hans ^{[2
]}

Hoffmann, Michael J. ^{[2
]}

Ozarowski, Andrew ^{[3
]}

van Tol, Hans ^{[3
]}

Brunel, Louis Claude ^{[3
]}

机构：

[1] Tech Univ Darmstadt, Eduard Zintl Inst, D-64287 Darmstadt, Germany

[2] Univ Karlsruhe, Inst Ceram Mech Engn, D-76131 Karlsruhe, Germany

[3] Florida State Univ, Natl High Magnet Field Lab, Ctr Interdisciplinary Magnet Resonance, Tallahassee, FL 32310 USA

来源：

PHYSICA SCRIPTA | 2007年 / T129卷

关键词：

D O I：

10.1088/0031-8949/2007/T129/003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Ferroelectric Pb[Zr0.4Ti0.6]O-3 ceramics codoped with La3+ and Fe3+ at dopant concentrations of 1.0 and 0.5 mol. %, respectively, were investigated by means of multifrequency electron paramagnetic resonance ( EPR) spectroscopy. The results prove that iron is incorporated at the [Zr, Ti]-site, acts as an acceptor and favors the creation of charged (Fe '(Zr,Ti) - V-O(center dot center dot))(center dot) defect dipoles that may give rise to internal bias fields also for 'soft' piezoelectric compounds. In particular, the iron functional center site symmetry was investigated. A multi-site situation was observed in which the orientation of the (Fe '(Zr),(Ti) - V-O(center dot center dot))(center dot) defect dipole with respect to the orientation of spontaneous polarization is responsible for a (Fe '(Zr,Ti) - V-O(center dot center dot))(center dot) center of 'tetragonal' and a different center of 'rhombic' local site symmetry.

引用

页码：12 / 16

页数：5

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