Spontaneous ferroelectric order in lead-free relaxor N a1/2 B i1/2Ti O3 -based composites

Lalitha K. V.; Manuel Hinterstein; Kai Yang Lee; Tiannan Yang; Long Qing Chen; Pedro B. Groszewicz; Jurij Koruza; Jürgen Rödel

doi:10.1103/PhysRevB.101.174108

Spontaneous ferroelectric order in lead-free relaxor N a1/2 B i1/2Ti O3 -based composites

Lalitha K. V.^*, Manuel Hinterstein, Kai Yang Lee, Tiannan Yang, Long Qing Chen, Pedro B. Groszewicz, Jurij Koruza, Jürgen Rödel

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

Short-range ordered polar nanoregions are key to the giant electromechanical properties exhibited by relaxor ferroelectrics. Stabilization of the long-range ferroelectric order in relaxor systems has typically been achieved by applying external fields. In this work, spontaneous (zero-field) ferroelectric order is demonstrated in the composites constituting of nonergodic relaxor matrix phase 0.91Na1/2Bi1/2TiO3-0.09BaTiO3 with ZnO inclusions. Direct structural evidence is provided for the long-range ferroelectric order in the composites using in situ electric-field-dependent synchrotron investigations and Na23 nuclear magnetic resonance spectroscopy. Thermodynamic analysis incorporating microelasticity reveals the role of spatial residual stress in stabilizing the ferroelectric order. The work provides a direct correlation between the stabilized ferroelectric order and enhanced thermal stability, which can be utilized to guide the design of spontaneous long-range order in other relaxor systems.

Original language	English
Article number	174108
Journal	Physical Review B
Volume	101
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevB.101.174108
Publication status	Published - 1 May 2020
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.101.174108

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@article{e3a6f54ddb9b4e759d6f139e964c134e,

title = "Spontaneous ferroelectric order in lead-free relaxor N a1/2 B i1/2Ti O3 -based composites",

abstract = "Short-range ordered polar nanoregions are key to the giant electromechanical properties exhibited by relaxor ferroelectrics. Stabilization of the long-range ferroelectric order in relaxor systems has typically been achieved by applying external fields. In this work, spontaneous (zero-field) ferroelectric order is demonstrated in the composites constituting of nonergodic relaxor matrix phase 0.91Na1/2Bi1/2TiO3-0.09BaTiO3 with ZnO inclusions. Direct structural evidence is provided for the long-range ferroelectric order in the composites using in situ electric-field-dependent synchrotron investigations and Na23 nuclear magnetic resonance spectroscopy. Thermodynamic analysis incorporating microelasticity reveals the role of spatial residual stress in stabilizing the ferroelectric order. The work provides a direct correlation between the stabilized ferroelectric order and enhanced thermal stability, which can be utilized to guide the design of spontaneous long-range order in other relaxor systems.",

author = "{K. V.}, Lalitha and Manuel Hinterstein and Lee, {Kai Yang} and Tiannan Yang and Chen, {Long Qing} and Groszewicz, {Pedro B.} and Jurij Koruza and J{\"u}rgen R{\"o}del",

note = "Funding Information: L.K.V. acknowledges and thanks the Alexander von Humboldt Foundation and the Deutsche Forschungsgemeinschaft under Grant No. KO 5948/1-1 (Nr. 414311761) for financial support. M.H. acknowledges the Deutsche Forschungsgemeinschaft under Grant No. HI 1867/1-1. The efforts at Penn State were supported by the National Science Foundation (NSF) under Grant No. DMR-1744213. L.Q.C. acknowledges the Humboldt Research Award. J. K. acknowledges the Deutsche Forschungsgemeinschaft under Grant No. KO 5100/3-1 (Nr. 414073759). P.B.G. acknowledges the Deutsche Forschungsgemeinschaft under Grants No. BU 911/28-1 and No. 397608312. Publisher Copyright: {\textcopyright} 2020 American Physical Society.",

year = "2020",

month = may,

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doi = "10.1103/PhysRevB.101.174108",

language = "English",

volume = "101",

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AU - K. V., Lalitha

AU - Hinterstein, Manuel

AU - Lee, Kai Yang

AU - Yang, Tiannan

AU - Chen, Long Qing

AU - Groszewicz, Pedro B.

AU - Koruza, Jurij

AU - Rödel, Jürgen

N1 - Funding Information: L.K.V. acknowledges and thanks the Alexander von Humboldt Foundation and the Deutsche Forschungsgemeinschaft under Grant No. KO 5948/1-1 (Nr. 414311761) for financial support. M.H. acknowledges the Deutsche Forschungsgemeinschaft under Grant No. HI 1867/1-1. The efforts at Penn State were supported by the National Science Foundation (NSF) under Grant No. DMR-1744213. L.Q.C. acknowledges the Humboldt Research Award. J. K. acknowledges the Deutsche Forschungsgemeinschaft under Grant No. KO 5100/3-1 (Nr. 414073759). P.B.G. acknowledges the Deutsche Forschungsgemeinschaft under Grants No. BU 911/28-1 and No. 397608312. Publisher Copyright: © 2020 American Physical Society.

PY - 2020/5/1

Y1 - 2020/5/1

N2 - Short-range ordered polar nanoregions are key to the giant electromechanical properties exhibited by relaxor ferroelectrics. Stabilization of the long-range ferroelectric order in relaxor systems has typically been achieved by applying external fields. In this work, spontaneous (zero-field) ferroelectric order is demonstrated in the composites constituting of nonergodic relaxor matrix phase 0.91Na1/2Bi1/2TiO3-0.09BaTiO3 with ZnO inclusions. Direct structural evidence is provided for the long-range ferroelectric order in the composites using in situ electric-field-dependent synchrotron investigations and Na23 nuclear magnetic resonance spectroscopy. Thermodynamic analysis incorporating microelasticity reveals the role of spatial residual stress in stabilizing the ferroelectric order. The work provides a direct correlation between the stabilized ferroelectric order and enhanced thermal stability, which can be utilized to guide the design of spontaneous long-range order in other relaxor systems.

AB - Short-range ordered polar nanoregions are key to the giant electromechanical properties exhibited by relaxor ferroelectrics. Stabilization of the long-range ferroelectric order in relaxor systems has typically been achieved by applying external fields. In this work, spontaneous (zero-field) ferroelectric order is demonstrated in the composites constituting of nonergodic relaxor matrix phase 0.91Na1/2Bi1/2TiO3-0.09BaTiO3 with ZnO inclusions. Direct structural evidence is provided for the long-range ferroelectric order in the composites using in situ electric-field-dependent synchrotron investigations and Na23 nuclear magnetic resonance spectroscopy. Thermodynamic analysis incorporating microelasticity reveals the role of spatial residual stress in stabilizing the ferroelectric order. The work provides a direct correlation between the stabilized ferroelectric order and enhanced thermal stability, which can be utilized to guide the design of spontaneous long-range order in other relaxor systems.

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Spontaneous ferroelectric order in lead-free relaxor N a1/2 B i1/2Ti O3 -based composites

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