Proceedings of the Korea Association of Crystal Growth Conference (한국결정성장학회:학술대회논문집)

The Korea Association of Crystal Growth (한국결정성장학회)
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Doping Effects of Mg and/or Fe ions on Congruent $LiNbO_3$ Single Crystal Growth

  • Bae, So-Ik (R&D Center, SSang Yong Cement Co.) ;
  • J. Ichikawa (Institute for Material Research, Tohoku University) ;
  • K. Shimamura (Institute for Material Research, Tohoku University) ;
  • H. Onodera (Institute for Material Research, Tohoku University) ;
  • T. Fukuda (Institute for Material Research, Tohoku University)
  • Published : 1997.06.01
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Abstract

The doping effects of Mg and/or Fe ions on congruent LiNbO$_3$ single crystal growth were studied in order to clarify the roles of MgO in Fe doped LiNbO$_3$ single crystals. The effective distribution coefficienct of Fe was found decreased drastically from 0.85 to 0.5 by the addition of MgO into the LiNbO$_3$ melt. M ssbauer spectra revealed that the addition of MgO reduces the occurrence of Fe2+ ions during growth in air. Therefore, it is likely that there would be two important roles of MgO in Fe doped LiNbO$_3$. One is to suppress the incorporation of all Fe ions, and the other is to reduce the concentration of Fe2+ ions among the total Fe ions.

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