Paper Title:
Dielectric Measurement for Barium Titanate Nanoparticles Using Far Infrared Reflection Method
  Abstract

Barium titanate (BaTiO3) nanoparticles with various particle sizes from 20 to 430 nm were prepared using a 2-step thermal decomposition method. Powder dielectric measurement clarified that dielectric constant of BaTiO3 particles with 140 nm exhibited a maximum around 5,000. To explain this high dielectric constant, THz-region dielectric properties of BaTiO3 nanoparticles, especially Slater transverse optic (TO) mode frequency, were estimated using the far infrared (FIR) reflection method. As the result, it was found that the Slater TO mode of BaTiO3 particles with 140 nm exhibited a minimum. Therefore, the high dielectric constant around 5,000 at 140 nm can be originated from the softening of the Slater TO mode.

  Info
Periodical
Edited by
K. Katayama, K. Kato, T. Takenaka, M. Takata and K. Shinozaki
Pages
47-50
DOI
10.4028/www.scientific.net/KEM.350.47
Citation
T. Hoshina, H. Kakemoto, T. Tsurumi, S. Wada, "Dielectric Measurement for Barium Titanate Nanoparticles Using Far Infrared Reflection Method ", Key Engineering Materials, Vol. 350, pp. 47-50, 2007
Online since
October 2007
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$32.00
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