X-Ray Diffraction Study of the Upper Phase Transition in NaH_3(SeO_3)_2

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概要

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• X-ray diffraction from NaH_3(SeO_3)_2 was measured together with additional optical observation of domains. The square root of integrated intensity of (5/2 5/2 0) reflection as a function of temperature is approximately proportional to the spontaneous polarization along the [101] direction, P^s_<[101]>. The unit cell parameters measured at 183K (in phase II) are a=20.32A, b=9.592A, c=5.759A, α=89°53', β=91°7', γ=90°20', with z=8 and the space group is confirmed to be P1. The present results suggest that the upper phase transition in NaH_3(SeO_3)_2 may be not regarded as a typical order-disorder type. Discussions are shortly given for the result obtained.

• 社団法人日本物理学会の論文
• 1973-05-05

著者

• Miki Hirohumi

  Department Of Applied Physics Faculty Of Science Science University Of Tokyo:(present Address) Depar

関連論文

• X-Ray Diffraction Study of the Upper Phase Transition in NaH_3(SeO_3)_2

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