TY - JOUR
T1 - Laser-induced crystallization of β′-RE2(MoO4)3 ferroelectrics (RE
T2 - Sm, Gd, Dy) in glasses and their surface morphologies
AU - Nakajima, R.
AU - Abe, M.
AU - Benino, Y.
AU - Fujiwara, T.
AU - Kim, H. G.
AU - Komatsu, T.
N1 - Funding Information:
This work was supported from Ministry of Internal Affairs and Communications Strategic Information and Communications R&D Promotion Programs (SCOPE), Grant-in-Aid for Scientific Research from the Ministry of Education, Science, Sports, Culture and Technology, Japan, and by the 21st Century Center of Excellence (COE) Program in Nagaoka University of Technology.
PY - 2007/1/1
Y1 - 2007/1/1
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.
AB - 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.
KW - Crystal growth
KW - Crystallization
KW - Non-linear optics
KW - Optical microscopy
KW - Optical properties
KW - Radiation
KW - Raman scattering
KW - Raman spectroscopy
KW - Rare-earths in glasses
KW - X-ray diffraction
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U2 - 10.1016/j.jnoncrysol.2006.08.050
DO - 10.1016/j.jnoncrysol.2006.08.050
M3 - Article
AN - SCOPUS:33845208792
VL - 353
SP - 85
EP - 93
JO - Journal of Non-Crystalline Solids
JF - Journal of Non-Crystalline Solids
SN - 0022-3093
IS - 1
ER -