skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Raman spectroscopy study of reduced strontium barium niobate (SBN61) and hints of supergrowth or intergrowth structures

Journal Article · · Journal of Raman Spectroscopy
DOI:https://doi.org/10.1002/jrs.5471· OSTI ID:1530528
 [1]; ORCiD logo [1];  [2];  [3]
  1. Lehigh Univ., Bethlehem, PA (United States)
  2. Pennsylvania State Univ., University Park, PA (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  3. Pennsylvania State Univ., University Park, PA (United States)

Reduced strontium barium niobate, SrxBa1-xNb2O6 (SBN), is a potential candidate for oxide thermoelectrics. In order to understand the effects of oxygen reduction on the structure and properties of SBN, room temperature Raman spectra of reduced and unreduced crystals with composition x=0.61 (SBN61) have been measured, fitted and compared, for incident light polarized successively along the crystallographic a and c-axes. Unexpectedly, the low frequency spectra (<200 cm-1) of reduced SBN are found to display much better resolved and intense peaks than those of unreduced SBN, suggestive of a more ordered and compact lattice arrangement in reduced SBN. Shape changes of certain peaks and the disappearance or appearance of other peaks (30 cm-1/1000 cm-1) are also observed as a result of reduction. Comparison of the experimental spectra and fits of the unreduced and reduced crystals are suggestive of a redistribution of the remaining oxygen anions, structural rearrangements and the development of super- or inter-growth structures in reduced SBN. The reduced spectra are found to be very similar to the published spectra of the H-form of niobium oxide, H-Nb205, which is made up of a regular block arrangement of corner-sharing and edge-sharing oxygen octahedra. These structural changes may play an important role in the enhanced electrical conductivity of reduced SBN.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1530528
Report Number(s):
SAND-2019-7014J; 676650
Journal Information:
Journal of Raman Spectroscopy, Vol. 49, Issue 11; ISSN 0377-0486
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 3 works
Citation information provided by
Web of Science

References (47)

Infrared and dielectric spectroscopy of the relaxor ferroelectric Sr 0.61 Ba 0.39 Nb 2 O 6 journal January 2005
SrxBa1−xNb2O6−δ Ferroelectric-thermoelectrics: Crystal anisotropy, conduction mechanism, and power factor journal January 2010
Thermoelectric power factor enhancement of textured ferroelectric Sr x Ba 1– x Nb 2 O 6–δ ceramics journal January 2011
Ferroelectric-thermoelectricity and Mott transition of ferroelectric oxides with high electronic conductivity journal December 2012
Thermoelectric Properties of Reduced Polycrystalline Sr 0.5 Ba 0.5 Nb 2 O 6 Fabricated Via Solution Combustion Synthesis journal May 2013
Ferroelectric Tungsten Bronze‐Type Crystal Structures. I. Barium Strontium Niobate Ba 0.27 Sr 0.75 Nb 2 O 5.78 journal June 1968
Structure of strontium barium niobate Sr x Ba 1 −  x Nb 2 O 6 (SBN) in the composition range 0.32 ≤ x ≤ 0.82 journal November 2006
A study of positional disorder in strontium barium niobate journal March 1996
Site occupancy and cation binding states in reduced polycrystalline Sr x Ba 1− x Nb 2 O 6 journal March 2014
Raman Scattering by Sr x Ba 1− x Nb 2 O 6 journal July 1971
Raman spectrum of Sr0.61Ba0.39Nb2O6 journal June 1991
Temperature study of the polarized Raman spectra of strontium barium niobate journal November 1973
Phase transition in Sr x Ba 1− x Nb 2 O 6 ferroelectric crystals probed by Raman spectroscopy journal November 2006
Raman spectroscopic study of structural transition in SrxBa1−xNb2O6 single crystals journal September 2012
Raman and infrared reflectivity spectra of potassium lithium niobate single crystals journal June 1997
The vibrational spectra of lithium niobate, barium sodium niobate and barium sodium tantalate journal August 1970
Temperature-dependent Raman spectra of ferroelectric potassium strontium niobate journal February 1975
Compositional dependence of optical and vibrational properties of strontium barium niobate (SrxBa1–xNb2O6) journal June 2007
Raman and IR phonons in ferroelectric Sr 0.35 Ba 0.69 Nb 2 O 6.04 single crystals journal February 2013
Study of the central peak in Raman spectra of SBN crystals journal September 2010
Intrinsic and extrinsic central peaks in the Brillouin light scattering spectrum of the uniaxial ferroelectric relaxor Sr0.61Ba0.39Nb2O6 journal August 2007
Raman Spectroscopy for Chemical Analysis book January 2000
Characterization of oxides on niobium by raman and infrared spectroscopy journal January 1999
Phonon modes and central peaks in an A -site relaxor: A low-frequency Raman study of sodium bismuth titanate journal August 2014
Temperature evolution of the relaxor dynamics in Pb ( Zn 1 3 Nb 2 3 ) O 3 : A critical Raman analysis journal November 2005
Direct observation of lattice defects in H -Nb 2 O 5 by high resolution electron microscopy journal January 1973
Raman spectra of niobium oxides journal January 1976
Structural chemistry and Raman spectra of niobium oxides journal January 1991
The crystal structure of the high temperature form of niobium pentoxide journal December 1964
Electron microscopy of high-temperature Nb2O5 and related phases journal January 1968
Double perovskites with oxygen structural vacancies: Raman spectra, conductivity and water uptake journal December 2001
On the possible role of dislocations in generating ordered and disordered shear structures journal August 1967
The Structures of Some Titanium-Niobium Oxides by Powder Neutron Diffraction journal June 1974
Thermoelectric properties and crystallographic shear structures in titanium oxides of the Magnèli phases journal October 2010
Mixed oxides of titanium and niobium: Intergrowth structures and defects journal June 1969
Coordination of cations in TiNb2O7 by Raman spectroscopy journal November 1982
Mixed oxides of titanium and niobium: the crystal structure of TiNb 24 O 62 (TiO 2 .12Nb 2 O 5 ) journal April 1965
Oxide phonon spectra journal January 1969
Calculations of defect properties important in photorefractive Sr 0.6 Ba 0.4 Nb 2 O 6 journal September 1993
Polaronic conduction and Anderson localization in reduced strontium barium niobate journal December 2015
The effect of high polaron concentration on the polaron transport in NbO 2.5-x : optical and electrical properties journal July 1988
Correlated Small-Polaron Hopping Motion journal December 1970
Raman and optical spectroscopic studies of small-to-large polaron crossover in the perovskite manganese oxides journal August 1998
Incommensurate phases in ferroelectric tetragonal tungsten bronzes journal October 1981
Correlated Small-Polaron Hopping Motion journal February 1971
On the possible role of dislocations in generating ordered and disordered shear structures journal April 1967
Raman Spectroscopy for Chemical Analysis journal April 2001

Similar Records

Polaronic conduction and Anderson localization in reduced strontium barium niobate
Journal Article · Mon Dec 07 00:00:00 EST 2015 · Applied Physics Letters · OSTI ID:1530528

Fabrication of optically transparent and electrooptic strontium barium niobate ceramics
Journal Article · Thu Aug 01 00:00:00 EDT 1991 · Journal of the American Ceramic Society; (United States) · OSTI ID:1530528

Site occupancy and cation binding states in reduced polycrystalline Sr{sub x}Ba{sub 1−x}Nb{sub 2}O{sub 6}
Journal Article · Mon Mar 10 00:00:00 EDT 2014 · Applied Physics Letters · OSTI ID:1530528