Correlation of the phonon characteristics and microwave dielectric properties of the Ba(Mg1/3Ta2/3)O3 materials

Hsiu Fung Cheng, Chia Ta Chia, Hsiang Lin Liu, Mei Yu Chen, Yuan Tai Tzeng, I. Nan Lin

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The Ba(Mg1/3Ta2/3)O3, BMT, materials possess the highest quality factor (Q × f) in microwave frequency regime among the microwave dielectric materials and can potentially be used for high frequency communication application. To understand the mechanism that determines microwave dielectric properties of the BMT materials, spectroscopic techniques including Raman and Fourier transform infrared (FTIR) analyses are used for investigating the phonon characteristics of the materials. The Raman-shift (Δω0j) of the Raman peaks and the resonance frequency (ω0j) of the FTIR peaks vary insignificantly among the samples, which correlate very well with the phenomenon that the K-values for these materials are similar with one another. In contrast, the full-width-at-half-maximum (FWHM) of the Raman peaks and the damping coefficient (γj) of the FTIR peaks vary markedly among the samples. The high-Q materials possess sharpest vibrational modes, viz., smallest FWHM value for Raman peaks and smallest γj value for FTIR peaks and vice versa. The intimate relationship between the phonon characteristics and the fine structure of the materials is confirmed.

Original languageEnglish
Pages (from-to)2893-2897
Number of pages5
JournalJournal of the European Ceramic Society
Volume27
Issue number8-9 SPEC. ISS.
DOIs
Publication statusPublished - 2007 Apr 2

Keywords

  • Dielectric properties
  • FTIR spectroscopies
  • Raman

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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