Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

A structural study of 0.06LiNbO3-0.94K0.5Na0.5NbO3 from neutron total scattering analysis

Kong, J. ; Liu, J. ; Marlton, F. ; Jørgensen, M. R.V. LU orcid and Pramanick, A. (2021) In Crystals 11(4).
Abstract

The structure of ferroelectric 0.06LiNbO3-0.94K0.5Na0.5NbO3 (KNNL6) was investigated by the neutron total scattering method in the temperature range of 290-773 K. The Rietveld analysis using the powder neutron diffraction data in the range of 290-773 K indicates transition from a two-phase (monoclinic and tetragonal) mixture at room temperature to tetragonal and cubic phases at higher temperatures. However, characterization of the local structure by the pair distribution function (PDF) method indicates that the local structure (r ≤ 10 Å) stays monoclinic over the same temperature range. Besides, the local oxygen octahedral distortion exhibits smaller changes with temperature than what is... (More)

The structure of ferroelectric 0.06LiNbO3-0.94K0.5Na0.5NbO3 (KNNL6) was investigated by the neutron total scattering method in the temperature range of 290-773 K. The Rietveld analysis using the powder neutron diffraction data in the range of 290-773 K indicates transition from a two-phase (monoclinic and tetragonal) mixture at room temperature to tetragonal and cubic phases at higher temperatures. However, characterization of the local structure by the pair distribution function (PDF) method indicates that the local structure (r ≤ 10 Å) stays monoclinic over the same temperature range. Besides, the local oxygen octahedral distortion exhibits smaller changes with temperature than what is observed for the long-range average structure.

(Less)
Please use this url to cite or link to this publication:
author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Ferroelectrics, Local structure, Neutron diffraction, Total scattering
in
Crystals
volume
11
issue
4
article number
395
publisher
MDPI AG
external identifiers
  • scopus:85104566654
ISSN
2073-4352
DOI
10.3390/cryst11040395
language
English
LU publication?
yes
id
428f9e88-87a0-4332-8dd1-91667325b6df
date added to LUP
2021-05-03 14:37:19
date last changed
2022-04-27 01:46:42
@article{428f9e88-87a0-4332-8dd1-91667325b6df,
  abstract     = {{<p>The structure of ferroelectric 0.06LiNbO<sub>3</sub>-0.94K<sub>0.5</sub>Na<sub>0.5</sub>NbO<sub>3</sub> (KNNL6) was investigated by the neutron total scattering method in the temperature range of 290-773 K. The Rietveld analysis using the powder neutron diffraction data in the range of 290-773 K indicates transition from a two-phase (monoclinic and tetragonal) mixture at room temperature to tetragonal and cubic phases at higher temperatures. However, characterization of the local structure by the pair distribution function (PDF) method indicates that the local structure (r ≤ 10 Å) stays monoclinic over the same temperature range. Besides, the local oxygen octahedral distortion exhibits smaller changes with temperature than what is observed for the long-range average structure.</p>}},
  author       = {{Kong, J. and Liu, J. and Marlton, F. and Jørgensen, M. R.V. and Pramanick, A.}},
  issn         = {{2073-4352}},
  keywords     = {{Ferroelectrics; Local structure; Neutron diffraction; Total scattering}},
  language     = {{eng}},
  number       = {{4}},
  publisher    = {{MDPI AG}},
  series       = {{Crystals}},
  title        = {{A structural study of 0.06LiNbO<sub>3</sub>-0.94K<sub>0.5</sub>Na<sub>0.5</sub>NbO<sub>3</sub> from neutron total scattering analysis}},
  url          = {{http://dx.doi.org/10.3390/cryst11040395}},
  doi          = {{10.3390/cryst11040395}},
  volume       = {{11}},
  year         = {{2021}},
}