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Neutron and x-ray scattering study of phonon dispersion and diffuse scattering in (Na,Bi)TiO3-xBaTiO(3) single crystals near the morphotropic phase boundary
Luo, Chengtao; Bansal, Dipanshu1; Li, Jiefang; Viehland, Dwight; Winn, Barry2; Ren, Yang3; Li, Xiaobing4; Luo, Haosu4; Delaire, Olivier1,5
2017
Source PublicationPHYSICAL REVIEW B
ISSN2469-9950
Volume96Issue:17
AbstractNeutron and x-ray scattering measurements were performed on (Na1/2Bi1/2)TiO3-x at%BaTiO3 (NBT-xBT) single crystals (x = 4, 5, 6.5, and 7.5) across the morphotropic phase boundary (MPB), as a function of both composition and temperature, and probing both structural and dynamical aspects. In addition to the known diffuse scattering pattern near the Gamma points, our measurements revealed new, faint superlattice peaks, as well as an extensive diffuse scattering network, revealing a short-range ordering of polar nanoregions (PNR) with a static stacking morphology. In samples with compositions closest to the MPB, our inelastic neutron scattering investigations of the phonon dynamics showed two unusual features in the acoustic phonon branches, between the superlattice points, and between the superlattice points and Gamma points, respectively. These critical elements are not present in the other compositions away from the MPB, which suggests that these features may be related to the tilt modes coupling behavior near the MPB.
DOI10.1103/PhysRevB.96.174108
WOS IDWOS:000414845800002
EI Accession Number2469-9969
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/26630
Collection中国科学院上海硅酸盐研究所
Affiliation1.Virginia Tech, Mat Sci & Engn, Blacksburg, VA 24061 USA
2.Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA
3.Oak Ridge Natl Lab, Quantum Condensed Matter Div, Oak Ridge, TN 37831 USA
4.Argonne Natl Lab, Xray Sci Div, Argonne, IL 60439 USA
5.Chinese Acad Sci, Shanghai Inst Ceram, 215 Chengbei Rd, Shanghai 201800, Peoples R China
6.Duke Univ, Mech Engn & Mat Sci Dept, Durham, NC 27708 USA
Recommended Citation
GB/T 7714
Luo, Chengtao,Bansal, Dipanshu,Li, Jiefang,et al. Neutron and x-ray scattering study of phonon dispersion and diffuse scattering in (Na,Bi)TiO3-xBaTiO(3) single crystals near the morphotropic phase boundary[J]. PHYSICAL REVIEW B,2017,96(17).
APA Luo, Chengtao.,Bansal, Dipanshu.,Li, Jiefang.,Viehland, Dwight.,Winn, Barry.,...&Delaire, Olivier.(2017).Neutron and x-ray scattering study of phonon dispersion and diffuse scattering in (Na,Bi)TiO3-xBaTiO(3) single crystals near the morphotropic phase boundary.PHYSICAL REVIEW B,96(17).
MLA Luo, Chengtao,et al."Neutron and x-ray scattering study of phonon dispersion and diffuse scattering in (Na,Bi)TiO3-xBaTiO(3) single crystals near the morphotropic phase boundary".PHYSICAL REVIEW B 96.17(2017).
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