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Jo, Wook
Sustainable Functional Ceramics Lab
Research Interests
  • Lead-free piezoceramics, ultra - low temperature sintering, ferroelectrics, relaxor ferroelectrics, 2D materials, magnetoelectric materials, multiferroics

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

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Title
Nanoscale phase quantification in lead-free (Bi1/2Na1/2)TiO3-BaTiO3 relaxor ferroelectrics by means of Na 23 NMR
Author
Groszewicz, Pedro B.Breitzke, HergenDittmer, RobertSapper, EvaJo, WookBuntkowsky, GerdRodel, Jurgen
Issue Date
2014-12
Publisher
American Physical Society
Citation
PHYSICAL REVIEW B, v.90, no.22, pp.1 - 5
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 Na23 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.
URI
https://scholarworks.unist.ac.kr/handle/201301/10201
URL
http://journals.aps.org/prb/abstract/10.1103/PhysRevB.90.220104
DOI
10.1103/PhysRevB.90.220104
ISSN
2469-9950
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