X-ray Study on the Disordered Structure above the Ferroelectric Curie Point in Potassium Nitrate

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概要

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• The disordered structure (phase I) above the ferroelectric Curie point (ca.125℃) in KNO_3 was studied by analysing X-ray diffuse scattering. The single crystal was prepared by slow cooling from the melt in a small glass tube which was mounted on the sample holder of a camera. The observed intensity distribution of the diffuse scattering in reciprocal space was characterized by six diffuse maxima observed around each reciprocal lattice point. From its analysis a characteristic arrangement, in which two kinds of "micro-domains" whose polar axes are antiparallel are alternately stacked in the direction A, B or -(A+B), was proposed as basic arrangement. It was found that the local tendency to take such an arrangement was strong especially when the coexistence of the phase I and the ferroelectric phase III took place, and that such a tendency decreased gradually with the increase of temperature.

• 社団法人日本物理学会の論文
• 1962-05-05

著者

• Shinnaka Yasuhiro

  Faculty Of Literature And Science Yamaguchi University

• Shinnaka Y.

  Faculty of Literature and Science, Yamaguchi University

関連論文

• X-ray Study on the Disordered Structure above the Ferroelectric Curie Point in Potassium Nitrate
• On the Metastable Transition and the Crystal Structure of Ammonium Nitrate (Tetragonal Modification)
• Anion Rotational Disorder in Sodium Nitrate
• X-Ray Study on the Molecular Rotation in Cubic Ammonium Nitrate
• X-ray Study on Molecular Rotation in Tetragonal Ammonium Nitrate
• On the Anomalous Transformation of NaCN

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