Pressure Driven Structural Evolutions of 0.935(Na0.5Bi0.5)TiO3-0.065BaTiO(3) Lead-Free Ferroelectric Single Crystal through Raman Spectroscopy

Pressure Driven Structural Evolutions of 0.935(Na0.5Bi0.5)TiO3-0.065BaTiO(3) Lead-Free Ferroelectric Single Crystal through Raman Spectroscopy

Pressure evolution of local structure and vibrational dynamics of the perovskite-type relaxor ferroelectric single crystal of 0.935(Na0.5Bi0.5)TiO3-0.065BaTiO(3) (NBT-6.5BT) is systematically investigated via in situ Raman spectroscopy. The pressure dependence of phonon modes up to 30 GPa reveals tw...

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Veröffentlicht in:Chinese physics letters 2021-02, Vol.38 (2), Article 026102
Hauptverfasser: Zheng, Qunfei, Li, Qiang, Xue, Saidong, Wu, Yanhui, Wang, Lijuan, Zhang, Qian, Qin, Xiaomei, Zhao, Xiangyong, Wang, Feifei, Yang, Wenge
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container_issue 2
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container_title Chinese physics letters
container_volume 38
creator Zheng, Qunfei
Li, Qiang
Xue, Saidong
Wu, Yanhui
Wang, Lijuan
Zhang, Qian
Qin, Xiaomei
Zhao, Xiangyong
Wang, Feifei
Yang, Wenge
description Pressure evolution of local structure and vibrational dynamics of the perovskite-type relaxor ferroelectric single crystal of 0.935(Na0.5Bi0.5)TiO3-0.065BaTiO(3) (NBT-6.5BT) is systematically investigated via in situ Raman spectroscopy. The pressure dependence of phonon modes up to 30 GPa reveals two characteristic pressures: one is at around 4.6 GPa which corresponds to the rhombohedral-to-tetragonal phase transition, showing that the pressure strongly suppresses the coupling between the off-centered A- and B-site cations; the other structural transition involving the oxygen octahedral tilt and vibration occurs at pressure similar to 13-15 GPa with certain degree of order-disorder transition, evidenced by the abnormal changes of intensity and FWHM in Raman spectrum.
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subjects Physical Sciences
Physics
Physics, Multidisciplinary
Science & Technology
title Pressure Driven Structural Evolutions of 0.935(Na0.5Bi0.5)TiO3-0.065BaTiO(3) Lead-Free Ferroelectric Single Crystal through Raman Spectroscopy
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