Pressure Driven Structural Evolutions of 0.935(Na0.5Bi0.5)TiO3-0.065BaTiO3Lead-Free Ferroelectric Single Crystal through Raman Spectroscopy

Zheng，Qunfei1,2,4; Li，Qiang1,3; Xue，Saidong1; Wu，Yanhui1; Wang，Lijuan2; Zhang，Qian3; Qin，Xiaomei1; Zhao，Xiangyong1; Wang，Feifei1; Yang，Wenge3

2021-02-01

10.1088/0256-307X/38/2/026102

CHINESE PHYSICS LETTERS   影响因子和分区

0256-307X

1741-3540

Pressure evolution of local structure and vibrational dynamics of the perovskite-type relaxor ferroelectric single crystal of 0.935(Na0.5Bi0.5)TiO3-0.065BaTiO3 (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 ∼13-15 GPa with certain degree of order-disorder transition, evidenced by the abnormal changes of intensity and FWHM in Raman spectrum.

SCI ; EI

英语

其他

National Natural Science Foundation of China[11674231,11974250,51772192] ; Science and Technology Commission of Shanghai Municipality[17070502700,19070502800]

Physics

Physics, Multidisciplinary

WOS:000625627900001

IOP PUBLISHING LTD

20220711657027

Barium titanate ; Crystal structure ; Ferroelectric materials ; Ferroelectricity ; Order disorder transitions ; Raman spectroscopy ; Single crystals

Minerals:482.2 ; Electricity: Basic Concepts and Phenomena:701.1 ; Dielectric Materials:708.1 ; Inorganic Compounds:804.2 ; Ceramics:812.1 ; Crystalline Solids:933.1 ; Crystal Lattice:933.1.1

PHYSICS

2-s2.0-85103336715

Scopus

1.Department of Physics,Mathematics and Science College,Shanghai Normal University,Shanghai,200234,China
2.Center for High Pressure Science and Technology Advanced Research (HPSTAR),Beijing,100094,China
3.Center for High Pressure Science and Technology Advanced Research (HPSTAR),Shanghai,201203,China
4.Academy for Advanced Interdisciplinary Studies,Shenzhen Engineering Research Center for Frontier Materials Synthesis at High Pressures,Southern University of Science and Technology (SUSTech),Shenzhen,518055,China

Zheng，Qunfei,Li，Qiang,Xue，Saidong,et al. Pressure Driven Structural Evolutions of 0.935(Na0.5Bi0.5)TiO3-0.065BaTiO3Lead-Free Ferroelectric Single Crystal through Raman Spectroscopy[J]. CHINESE PHYSICS LETTERS,2021,38(2).

Zheng，Qunfei.,Li，Qiang.,Xue，Saidong.,Wu，Yanhui.,Wang，Lijuan.,...&Yang，Wenge.(2021).Pressure Driven Structural Evolutions of 0.935(Na0.5Bi0.5)TiO3-0.065BaTiO3Lead-Free Ferroelectric Single Crystal through Raman Spectroscopy.CHINESE PHYSICS LETTERS,38(2).

Zheng，Qunfei,et al."Pressure Driven Structural Evolutions of 0.935(Na0.5Bi0.5)TiO3-0.065BaTiO3Lead-Free Ferroelectric Single Crystal through Raman Spectroscopy".CHINESE PHYSICS LETTERS 38.2(2021).