X-Ray Structural Study of Ferroelectric KH2AsO4 and KD2AsO4

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概要

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• In order to understand systematically the relationship between the crystal structure and phase transition in tetragonal KH2PO4 (KDP) family, the structures of KH2AsO4 (KDA) and KD2AsO4 (DKDA), which are the end members concerning the transition temperature Tc, have been studied by X-ray diffraction at room temperature and at Tc+5 K (110 K and 171 K, respectively). It was revealed that the hydrogen-bond distances ROO for KDA and DKDA are longer than those for KDP and DKDP, respectively. These results smear the linear ROO vs Tc relation found earlier in the tetragonal KDP family, contrary to our expectation. The temperature dependence of the bond lengths and angles in KDA and DKDA are compared with those in other members in the family and similarity and difference are discussed.

• 2001-08-15

著者

• Amasaki Daisuke

  Division Of Physics Graduate School Of Science Hokkaido University

• Ichikawa Mizuhiko

  Division Of Physics Graduate School Of Science Hokkaido University

• Gustafsson Torbjorn

  Materials Chemistry Angstrom Laboratory Uppsala University

• Gustafsson Torbjörn

  Materials Chemistry, Ångström Laboratory, Uppsala University, Box 538, SE-751 21 Uppsala, Sweden

• Olovsson Ivar

  Materials Chemistry, Ångström Laboratory, Uppsala University, Box 538, SE-751 21 Uppsala, Sweden

• Ichikawa Mizuhiko

  Division of Physics, Graduate School of Science, Hokkaido University, Sapporo 060-0810

• Olovsson Ivar

  Materials Chemistry, Ångström Laboratory, Uppsala University, Box 538, SE-751 21 Uppsala, Sweden

• Amasaki Daisuke

  Division of Physics, Graduate School of Science, Hokkaido University, Sapporo 060-0810

関連論文

• X-Ray Structural Study of Ferroelectric KH_2AsO_4 and KD_2AsO_4
• X-Ray Structural Study of Ferroelectric KH2AsO4 and KD2AsO4

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