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

被引：59

作者：

Groszewicz, Pedro B. ^{[1
]}

Breitzke, Hergen ^{[1
]}

Dittmer, Robert ^{[2
]}

Sapper, Eva ^{[2
]}

Jo, Wook ^{[3
]}

Buntkowsky, Gerd ^{[1
]}

Roedel, Juergen ^{[2
]}

机构：

[1] Tech Univ Darmstadt, Inst Phys Chem, D-64287 Darmstadt, Germany

[2] Tech Univ Darmstadt, Dept Mat Sci, D-64287 Darmstadt, Germany

[3] Ulsan Natl Inst Sci & Technol, Sch Mat Sci & Engn, Ulsan 689798, South Korea

来源：

PHYSICAL REVIEW B | 2014年 / 90卷 / 22期

关键词：

QUADRUPOLAR NUCLEI; AVERAGE STRUCTURE; TRANSITIONS;

D O I：

10.1103/PhysRevB.90.220104

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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-xBaTiO(3) (BNT-xBT) (for x = 1, 4, 6, and 15). Based on the relative intensity between spectral components in quadrupolar perturbed Na-23 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.

引用

页数：5

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