Laser-induced crystallization of β′-RE2(MoO4)3 ferroelectrics (RE: Sm, Gd, Dy) in glasses and their surface morphologies

R. Nakajima, M. Abe, Y. Benino, T. Fujiwara, H. G. Kim, T. Komatsu

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

The glasses with the compositions of 21.25RE2O3-63.75MoO3-15B2O3 (RE: Sm, Gd, Dy) were prepared and the formation of β′-RE2(MoO4)3 ferroelectrics was confirmed in the crystallized glasses obtained through a conventional crystallization in an electric furnace. The features of the glass structure and crystallization behavior were clarified from measurements of Raman scattering spectra. Continuous-wave Nd:YAG laser with a wavelength of 1064 nm (laser power: 0.6-0.9 W, laser scanning speed: S = 1-16 μm/s) was irradiated to 10.625Sm2O3-10.625Gd2O3 (or Dy2O3)-63.75MoO3-15B2O3 glasses, and the structural modification was induced at the glass surface. At the scanning speed of S = 10 μm/s, crystal lines consisting of β′-Gd2-xSmx(MoO4)3 or β′-Dy2-xSmx(MoO4)3 crystals were patterned on the glass surface. It was found that those crystal lines have the surface morphology with periodic bumps. At S = 1 μm/s, it was found that crystal lines consist of the mixture of paraelectric α-Gd2-xSmx(MoO4)3 and ferroelectric β′-Gd2-xSmx(MoO4)3 crystals, indicating the phase transformation from the β′ phase to the α phase during laser irradiation. Homogeneous crystal lines with β′-RE2(MoO4)3 ferroelectrics have not been written in this study, but further research is continuing.

Original languageEnglish
Pages (from-to)85-93
Number of pages9
JournalJournal of Non-Crystalline Solids
Volume353
Issue number1
DOIs
Publication statusPublished - Jan 1 2007
Externally publishedYes

Keywords

  • Crystal growth
  • Crystallization
  • Non-linear optics
  • Optical microscopy
  • Optical properties
  • Radiation
  • Raman scattering
  • Raman spectroscopy
  • Rare-earths in glasses
  • X-ray diffraction

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

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