BROWSE

Related Researcher

Author's Photo

Park, Kibog
Emergent Materials & Devices Lab
Research Interests
  • Semiconductor, Metal Oxide Thin Film, Graphene, Non-Volatile Memory, Quantum Transport, Quantum Computing Device

ITEM VIEW & DOWNLOAD

Effect of Ca Content on the Acoustic Anomalies of Ba1-xCaxTiO3 Single Crystals Studied by Brillouin Light Scattering

Cited 1 times inthomson ciCited 2 times inthomson ci
Title
Effect of Ca Content on the Acoustic Anomalies of Ba1-xCaxTiO3 Single Crystals Studied by Brillouin Light Scattering
Author
Kim, Tae HyunKo, Jae-HyeonPark, KibogKojima, SeijiKim, Sung Baek
Keywords
Barium calcium titanate; Barium titanate; Brillouin scattering; Central peak; Polar cluster
Issue Date
2011-09
Publisher
KOREAN PHYSICAL SOC
Citation
JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.59, no.3, pp.2575 - 2578
Abstract
The acoustic anomalies of the longitudinal acoustic mode of Ba1-xCaxTiO3 single crystals with x = 0, 0.12, and 0.20 were investigated in a wide temperature range of 290 similar to 873 K by using a Brillouin light scattering technique. The remarkable changes in the Brillouin frequency shift and the half width of this acoustic mode were attributed to the coupling between the acoustic mode and the polarization fluctuations induced by the precursor polar clusters near the ferroelectric phase transition temperature. The relaxation time estimated from the acoustic mode anomaly showed a critical slowing down behavior and increased with the Ca content. This indicates that the addition of Ca ions at A sites of the perovskite structure of BaTiO3 induces an additional polarization component due to its off-center displacements, thus making the cluster dynamics more sluggish than it is in pure BaTiO3.
URI
Go to Link
DOI
10.3938/jkps.59.2575
ISSN
0374-4884
Appears in Collections:
PHY_Journal Papers
Files in This Item:
000294971800028.pdf Download

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU