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Nanoscale phase quantification in lead-free (Bi1/2Na1/2)TiO3-BaTiO3 relaxor ferroelectrics by means of 23Na NMR

Groszewicz, Pedro B. and Breitzke, Hergen and Dittmer, Robert and Sapper, Eva and Jo, Wook and Buntkowsky, Gerd and Rödel, Jürgen (2014):
Nanoscale phase quantification in lead-free (Bi1/2Na1/2)TiO3-BaTiO3 relaxor ferroelectrics by means of 23Na NMR.
In: Physical Review B, pp. 220104(1-5), 90, (22), ISSN 1098-0121,
[Online-Edition: http://dx.doi.org/10.1103/PhysRevB.90.220104],
[Article]

Abstract

We address the unsolved question on the structure of relaxor ferroelectrics at the atomic level by characterizing lead-free piezoceramic solid solutions (100 − x)(Bi1/2Na1/2)TiO3-xBaTiO3 (BNT-xBT) (for x = 1, 4, 6, and 15). Based on the relative intensity between spectral components in quadrupolar perturbed 23Na nuclear magnetic resonance, we present direct evidence of the coexistence of cubic and polar local symmetries in these relaxor ferroelectrics. In addition, we demonstrate how the cubic phase vanishes whenever a ferroelectric state is induced, either by field cooling or changing the dopant amount, supporting the relation between this cubic phase and the relaxor state.

Item Type: Article
Erschienen: 2014
Creators: Groszewicz, Pedro B. and Breitzke, Hergen and Dittmer, Robert and Sapper, Eva and Jo, Wook and Buntkowsky, Gerd and Rödel, Jürgen
Title: Nanoscale phase quantification in lead-free (Bi1/2Na1/2)TiO3-BaTiO3 relaxor ferroelectrics by means of 23Na NMR
Language: English
Abstract:

We address the unsolved question on the structure of relaxor ferroelectrics at the atomic level by characterizing lead-free piezoceramic solid solutions (100 − x)(Bi1/2Na1/2)TiO3-xBaTiO3 (BNT-xBT) (for x = 1, 4, 6, and 15). Based on the relative intensity between spectral components in quadrupolar perturbed 23Na nuclear magnetic resonance, we present direct evidence of the coexistence of cubic and polar local symmetries in these relaxor ferroelectrics. In addition, we demonstrate how the cubic phase vanishes whenever a ferroelectric state is induced, either by field cooling or changing the dopant amount, supporting the relation between this cubic phase and the relaxor state.

Journal or Publication Title: Physical Review B
Volume: 90
Number: 22
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > A - Synthesis > Subproject A1: Manufacturing of ceramic, textured actuators with high strain
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > B - Characterisation > Subproject B9: Characterization of Structure-Property-Relationships of electrical Functional Materials with Solid State-NMR
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > D - Component properties > Subproject D1: Mesoscopic and macroscopic fatigue in doped ferroelectric ceramics
11 Department of Materials and Earth Sciences > Material Science
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 > D - Component properties
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue
11 Department of Materials and Earth Sciences
Zentrale Einrichtungen
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
DFG-Collaborative Research Centres (incl. Transregio)
Date Deposited: 05 Jan 2015 11:36
Official URL: http://dx.doi.org/10.1103/PhysRevB.90.220104
Additional Information:

SFB 595 Cooperation A1, B9, D1

Identification Number: doi:10.1103/PhysRevB.90.220104
Funders: Financial support by the Deutsche Forschungsgemeinschaft in the framework SFB-595 “Electric Fatigue in Functional Materials” is gratefully acknowledged.
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