Patterning of Ferroelectric .BETA.'-Gd2(MoO4)3 Crystal Lines on the Glass Surface by Transition Metal Atom Heat Processing

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  • NAKAJIMA Ryo
    Department of Materials Science and Technology, Nagaoka University of Technology
  • HONMA Tsuyoshi
    Department of Materials Science and Technology, Nagaoka University of Technology
  • BENINO Yasuhiko
    Department of Environmental Chemistry and Materials, Faculty of Environmental Science and Technology, Okayama University
  • KOMATSU Takayuki
    Department of Materials Science and Technology, Nagaoka University of Technology

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  • Patterning of ferroelectric β-Gd2(MoO4)3 crystal lines on the glass surface by transition metal atom heat processing
  • Patterning of ferroelectric ベータ Gd2 MoO4 3 crystal lines on the glass surface by transition metal atom heat processing

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Lines consisting of ferroelectric β′-Gd2(MoO4)3 crystals are patterned on the surface of NiO (2 mol%)-doped 21.25Gd2O3·63.75MoO3middot;15B2O3 glass by continuous wave (cw) Nd: YAG laser irradiations with a wavelength of λ=1064 nm, where laser energies absorbed by Ni2+ ions are converted to the local heating of surrounding Ni2+ ions. The surface morphology of crystals in the patterned lines is clarified from confocal scanning laser microscope observations. β′-Gd2(MoO4)3 crystal lines patterned by laser irradiations with a power of 0.73 W and a scanning speed of 2.5 μm/s show a smooth surface with a bump (width: 9 μm, height: 3 μm), and it is suggested from polarized micro-Raman scattering spectra that β′-Gd2(MoO4)3 crystals might orient along the laser scanning direction. The present study demonstrates that the transition metal atom heat processing, i.e., a combination of cw Nd:YAG laser and Ni2+ ions, is a novel technique for spatially selected crystallization in rare-earth containing glasses.<br>

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