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Neutron and x-ray scattering study of phonon dispersion and diffuse scattering in (Na,Bi)Ti O3-xBaTi O3 single crystals near the morphotropic phase boundary

Publication ,  Journal Article
Luo, C; Bansal, D; Li, J; Viehland, D; Winn, B; Ren, Y; Li, X; Luo, H; Delaire, O
Published in: Physical Review B
November 10, 2017

Neutron and x-ray scattering measurements were performed on (Na1/2Bi1/2)TiO3-xat%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 Γ 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 Γ 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.

Duke Scholars

Published In

Physical Review B

DOI

EISSN

2469-9969

ISSN

2469-9950

Publication Date

November 10, 2017

Volume

96

Issue

17

Related Subject Headings

  • 51 Physical sciences
  • 40 Engineering
  • 34 Chemical sciences
 

Citation

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MLA
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Luo, C., Bansal, D., Li, J., Viehland, D., Winn, B., Ren, Y., … Delaire, O. (2017). Neutron and x-ray scattering study of phonon dispersion and diffuse scattering in (Na,Bi)Ti O3-xBaTi O3 single crystals near the morphotropic phase boundary. Physical Review B, 96(17). https://doi.org/10.1103/PhysRevB.96.174108
Luo, C., D. Bansal, J. Li, D. Viehland, B. Winn, Y. Ren, X. Li, H. Luo, and O. Delaire. “Neutron and x-ray scattering study of phonon dispersion and diffuse scattering in (Na,Bi)Ti O3-xBaTi O3 single crystals near the morphotropic phase boundary.” Physical Review B 96, no. 17 (November 10, 2017). https://doi.org/10.1103/PhysRevB.96.174108.
Luo, C., et al. “Neutron and x-ray scattering study of phonon dispersion and diffuse scattering in (Na,Bi)Ti O3-xBaTi O3 single crystals near the morphotropic phase boundary.” Physical Review B, vol. 96, no. 17, Nov. 2017. Scopus, doi:10.1103/PhysRevB.96.174108.
Luo C, Bansal D, Li J, Viehland D, Winn B, Ren Y, Li X, Luo H, Delaire O. Neutron and x-ray scattering study of phonon dispersion and diffuse scattering in (Na,Bi)Ti O3-xBaTi O3 single crystals near the morphotropic phase boundary. Physical Review B. 2017 Nov 10;96(17).

Published In

Physical Review B

DOI

EISSN

2469-9969

ISSN

2469-9950

Publication Date

November 10, 2017

Volume

96

Issue

17

Related Subject Headings

  • 51 Physical sciences
  • 40 Engineering
  • 34 Chemical sciences