Lattice dynamics study of high-quality strontium bismuth tantalate single crystals
authors Almeida, A; Chaves, MR; Amorin, H; Costa, MEV; Kholkin, AL
nationality International
journal JOURNAL OF PHYSICS-CONDENSED MATTER
keywords FERROELECTRIC PHASE-TRANSITION; LAYERED PEROVSKITE SRBI2TA2O9; ELECTRONIC-STRUCTURE; THIN-FILMS; RAMAN; CERAMICS
abstract Raman scattering was investigated in high-quality SrBi2Ta2O9 (SBT) single crystals prepared by the self-flux solution method. The Raman spectra in the range 6-1800 cm(-1) were monitored as a function of temperature both below and above the ferroelastic-ferroelectric phase transition at about 600 K. The behaviour of the soft ferroelectric mode and of its damping coefficient near the phase transition indicates a strong coupling with an acoustical phonon. The results provide clear evidence for a crossing over from a displacive to an order-disorder component and they are discussed in terms of a complex sequence of the phase transitions in SBT.
publisher IOP PUBLISHING LTD
issn 0953-8984
year published 2005
volume 17
issue 48
beginning page 7605
ending page 7612
digital object identifier (doi) 10.1088/0953-8984/17/48/012
web of science category Physics, Condensed Matter
subject category Physics
unique article identifier WOS:000234268600014
  ciceco authors
  impact metrics
journal analysis (jcr 2019):
journal impact factor 2.707
5 year journal impact factor 2.659
category normalized journal impact factor percentile 55.797
dimensions (citation analysis):
altmetrics (social interaction):



 


Sponsors

1suponsers_list_ciceco.jpg