Crystal Structure of the High Temperature Phase of Strontium Barium Niobate

• Authors: R. Paszkowski , M. Zubko , K. Wokulska , J. Kusz , J. Dec
• Languages of publication: EN

Abstracts

EN

Pure and undoped strontium-barium niobate Sr_{0.40}Ba_{0.60}Nb₂O₆ (SBN40) single crystals grown by the Czochralski method were investigated by single crystal X-ray diffraction methods. The study below T_{C} (429 K for SBN40) confirmed the structure with P4bm space group. Above this temperature the structure transforms into the paraelectric, centrosymmetric one with P4/mbm space group. Analysis of the recorded diffraction patterns allowed to observe several signs of crystal structure modulation. On the registered diffraction images satellite reflections were found. A modulation vector q=(δ,±δ,), where δ=0.3075(6) (at room temperature) was found and it was similar to that occurring in the SBN61. In addition, above the phase transition temperature on the (hk) planes with l integer a weak diffuse scattering was observed.

Keywords

EN

42.70.Mp; 77.84.Dy; 61.50.-f; 71.55.Jv

Discipline

• 61.50.-f: Structure of bulk crystals
• 42.70.Mp: Nonlinear optical crystals(see also 77.84.-s Dielectric, piezoelectric, and ferroelectric materials)
• 71.55.Jv: Disordered structures; amorphous and glassy solids

• Journal: Acta Physica Polonica A
• Year: 2016
• Volume: 130
• Issue: 4
• Pages: 856-858

Dates

published

2016-10

Contributors

author

R. Paszkowski

• Institute of Materials Science, University of Silesia, 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland

author

M. Zubko

• Institute of Materials Science, University of Silesia, 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland

author

K. Wokulska

• Institute of Materials Science, University of Silesia, 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland

author

J. Kusz

• Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland

author

J. Dec

• Institute of Materials Science, University of Silesia, 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland

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Identifiers

DOI

10.12693/APhysPolA.130.856