Dynamical properties of polar nanoregions of relaxor ferroelectric Pb(Ni1/3Nb2/3)O3-0.29PbTiO3

Shinya Tsukada, Yuji Ike, Jun Kano, Tadashi Sekiya, Yoshiro Shimojo, Ruiping Wang, Seiji Kojima

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

Dynamical properties of the polar nanoregions (PNRs) of a relaxor ferroelectric Pb(Ni1/3Nb2/3)O3-0.29PbTiO 3 single crystal are studied by using Brillouin scattering to elucidate the mechanism of the diffuse phase transition. The temperature dependence of Brillouin scattering shows anomalies at three temperatures: at Td related to the appearance of the PNRs, at T* associated with the growth of the PNRs, and at Tf related to the macroscopic structural phase transition; all these temperatures are closely related to the dynamical behavior of the PNRs. The thermal hysteresis around Tf in the longitudinal acoustic properties can be interpreted by considering the growth process of the PNRs. From the anomalous acoustic properties, the relaxation time of the polarization fluctuation is evaluated. It is found that the relaxational process responsible for the central peak originates from the polarization fluctuation that is coupled with the longitudinal acoustic mode.

Original languageEnglish
Article number033707
Journaljournal of the physical society of japan
Volume77
Issue number3
DOIs
Publication statusPublished - Mar 1 2008
Externally publishedYes

Keywords

  • Brillouin scattering
  • Central peak
  • Ferroelectrics
  • Relaxor
  • Structural phase transition

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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