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

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

Research output: Contribution to journalArticle

28 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

Fingerprint

Crystallization
Ferroelectric materials
Surface morphology
crystallization
Glass
Crystals
Lasers
glass
crystals
lasers
electric furnaces
Scanning
Electric furnaces
scanning
continuous wave lasers
Laser beam effects
phase transformations
Raman scattering
YAG lasers
Phase transitions

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

  • Ceramics and Composites
  • Electronic, Optical and Magnetic Materials

Cite this

Laser-induced crystallization of β′-RE2(MoO4)3 ferroelectrics (RE : Sm, Gd, Dy) in glasses and their surface morphologies. / Nakajima, R.; Abe, M.; Benino, Yasuhiko; Fujiwara, T.; Kim, H. G.; Komatsu, T.

In: Journal of Non-Crystalline Solids, Vol. 353, No. 1, 01.01.2007, p. 85-93.

Research output: Contribution to journalArticle

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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.",
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AU - Abe, M.

AU - Benino, Yasuhiko

AU - Fujiwara, T.

AU - Kim, H. G.

AU - Komatsu, T.

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N2 - 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.

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