Piezoelectric (Na0.5K0.5)NbO3-SrTiO 3 ceramics in the tetragonal-orthorhombic phase boundary studied by Raman spectroscopy

Jun Kano, Keita Sasanuma, Shinya Tsukada, Seiji Kojima, Ruiping Wang, Kotaro Hanada, Kunio Matsusaki, Hiroshi Bando

Research output: Contribution to journalConference articlepeer-review

6 Citations (Scopus)


Raman spectroscopy of lead-free piezoelectric (1-x)(Na0.5K0.5)NbO3-xSrTiO3 ceramics and (Na1 - yKy)NbO3 ones sintered by the Spark-Plasma-Sintering method have been performed to investigate the dynamical property in the intermediate phase of x = 0.05. From the comparison of Raman spectra between (1-x)(Na0.5K0.5)NbO3-xSrTiO3 and (Na1 - yKy)NbO3 at room temperature, the overdamped mode which became soften was found in the intermediate phase at x = 0.05. Although it is difficult to assign the mode because of using ceramics samples, this result has a possibility that the overdamped mode includes the soft mode observed in the orthorhombic phase.

Original languageEnglish
Pages (from-to)55-59
Number of pages5
Publication statusPublished - 2007
Externally publishedYes
Event8th Russia/CIS/Baltic/Japan Symposium on Ferroelectricity, RCBJSF-8 - Tsukuba, Japan
Duration: May 15 2006May 19 2006

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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