Ferroelectric Properties and Second Harmonic Intensities of Stillwellite-Type (La,<i>Ln</i>)BGeO₅Crystallized Glasses

• Takahashi Yoshihiro

  Department of Chemistry, Nagaoka University of Technology, Nagaoka 940-2188, Japan

• Iwasaki Akihisa

  Department of Chemistry, Nagaoka University of Technology, Nagaoka 940-2188, Japan

• Benino Yasuhiko

  Department of Chemistry, Nagaoka University of Technology, Nagaoka 940-2188, Japan

• Fujiwara Takumi

  Department of Chemistry, Nagaoka University of Technology, Nagaoka 940-2188, Japan

• Komatsu Takayuki

  Department of Chemistry, Nagaoka University of Technology, Nagaoka 940-2188, Japan

書誌事項

タイトル別名

• Ferroelectric Properties and Second Harmonic Intensities of Stillwellite-Type (La,Ln)BGeO5 Crystallized Glasses.

抄録

Glasses with compositions corresponding to stillwellite-type (La,Ln)BGeO₅ (Ln: Nd, Gd, Eu and Tm) crystalline phases have been prepared, and the effect of lanthanide substitutions on ferroelectric properties and second harmonic (SH) intensities of stillwellite-type crystalline phases formed by crystallization of glasses has been examined. The substitution of Ln³⁺ for La³⁺ ions in the LaBGeO₅ phase has been confirmed from the results of X-ray diffraction (XRD) analysis and fluorescence spectra of Eu³⁺ ions. The substitution of Ln³⁺ for La³⁺ ions causes a decrease not only in the lattice constants but also in the a/c axis ratio. The amount of substitutions depends on the Ln³⁺ ionic radius. The Curie temperature of crystallized glasses increases almost linearly with decreasing mean ionic radius of lanthanides estimated from the composition of base glasses. A similar trend is observed in the SH intensity for crystallized glasses (powdered form), indicating the presence of a close relationship between Curie temperature and SH intensity. It is proposed from Raman spectra that the enhancement of SH intensities is caused by the change in the arrangements of BO₄ and GeO₄ tetrahedra in the (La,Ln)BGeO₅ crystals due to the substitution of Ln³⁺ ions having stronger Ln³⁺-O bonds. A clear second harmonic generation is observed in transparent surface crystallized glasses of the Nd₂O₃- or Gd₂O₃-substituted system.

収録刊行物

• Japanese Journal of Applied Physics

  Japanese Journal of Applied Physics 41 (6A), 3771-3777, 2002

  The Japan Society of Applied Physics

キーワード

• nonlinear optical crystal
• Curie temperature
• second harmonic intensity
• crystallized glass
• (La,<I>Ln</I>)BGeO<FONT SIZE="-1"><SUB>5</SUB></FONT>

詳細情報

• CRID: 1390282681233548544
• NII論文ID: 210000051554
• NII論文ID: 110004031266
• NII書誌ID: AA10457675
• DOI: 10.1143/jjap.41.3771
• ISSN: 13474065
• ISSN: 00214922
• NDL書誌ID: 6195160
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6195160
• Web Site: http://stacks.iop.org/1347-4065/41/i=6R/a=3771/pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可