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Reorientation of (Mn[sub Ti][sup ʺ]−V[sub O][sup ●●])[sup ×] defect dipoles in acceptor-modified BaTiO[sub 3] single crystals: An electron paramagnetic resonance study

Zhang, Lixue and Erdem, Emre and Ren, Xiaobing and Eichel, Rüdiger-A. (2008):
Reorientation of (Mn[sub Ti][sup ʺ]−V[sub O][sup ●●])[sup ×] defect dipoles in acceptor-modified BaTiO[sub 3] single crystals: An electron paramagnetic resonance study.
In: Applied Physics Letters, pp. 202901-1-202901-3, 93, (20), ISSN 00036951, [Online-Edition: http://dx.doi.org/10.1063/1.3006327],
[Article]

Abstract

The effect of external electric fields on the orientation of (MnTi″−VO••)× defect dipoles in ferroelectric BaTiO3 single crystals and its interplay with the domain structure were investigated by means of electron paramagnetic resonance (EPR) spectroscopy and optical microscopy. The results show that in specimens aged in the ferroelectric state for a defined time, so-termed ferroelectrically aged, the (MnTi″−VO••)× defect dipoles orient along the direction of spontaneous polarization and follow the domain switching upon poling with correspondingly high electric fields. A comparison of the EPR signal in poled aged single-domain samples to that in naturally aged multidomain samples indicates a similar reorientation process of the defect dipole, which means that dipole reorientation rather requires long time, thermal energy, and high electric fields, i.e., more energy.

Item Type: Article
Erschienen: 2008
Creators: Zhang, Lixue and Erdem, Emre and Ren, Xiaobing and Eichel, Rüdiger-A.
Title: Reorientation of (Mn[sub Ti][sup ʺ]−V[sub O][sup ●●])[sup ×] defect dipoles in acceptor-modified BaTiO[sub 3] single crystals: An electron paramagnetic resonance study
Language: English
Abstract:

The effect of external electric fields on the orientation of (MnTi″−VO••)× defect dipoles in ferroelectric BaTiO3 single crystals and its interplay with the domain structure were investigated by means of electron paramagnetic resonance (EPR) spectroscopy and optical microscopy. The results show that in specimens aged in the ferroelectric state for a defined time, so-termed ferroelectrically aged, the (MnTi″−VO••)× defect dipoles orient along the direction of spontaneous polarization and follow the domain switching upon poling with correspondingly high electric fields. A comparison of the EPR signal in poled aged single-domain samples to that in naturally aged multidomain samples indicates a similar reorientation process of the defect dipole, which means that dipole reorientation rather requires long time, thermal energy, and high electric fields, i.e., more energy.

Journal or Publication Title: Applied Physics Letters
Volume: 93
Number: 20
Uncontrolled Keywords: barium compounds, dielectric polarisation, doping, electric domains, ferroelectric materials, ferroelectric switching, manganese, optical microscopy, paramagnetic resonance, vacancies (crystal)
Divisions: 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 > 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: 08 Aug 2011 10:40
Official URL: http://dx.doi.org/10.1063/1.3006327
Additional Information:

SFB 595 B1

Identification Number: doi:10.1063/1.3006327
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