A Test of Centrosymmetry of the Hexagonal Phase in K2SeO4

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  • Inoue Kuon
    Department of Physics, Faculty of Science, Shizuoka University
  • Suzuki Kenji
    Department of Physics, Faculty of Science, Shizuoka University
  • Sawada Akikatsu
    Synthetic Crystal Research Laboratory, Faculty of Engineering, Nagoya University
  • Ishibashi Yoshihiro
    Synthetic Crystal Research Laboratory, Faculty of Engineering, Nagoya University
  • Takagi Yutaka
    Synthetic Crystal Research Laboratory, Faculty of Engineering, Nagoya University

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タイトル別名
  • A Test of Centrosymmetry of the Hexagonal Phase in K<SUB>2</SUB>SeO<SUB>4</SUB>
  • Test of Centrosymmetry of the Hexagonal

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Second harmonic generation measurement has been performed to see whether or not K2SeO4 crystal is centrosymmetric in its hexagonal phase. All examined SHG signals were weaker than the detectable limit of our experimental setup, implying that SHG coefficient d33 of K2SeO4 is estimated to be smaller than 5.3×10−3·d11 of quartz. The present experiment indicates that the space group of the hexagonal phase of K2SeO4 is nonpolar D6h4–P63/mmc rather than polar C6v4–P63mc.

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