偏光解析法とX線回折法による氷結晶の表面融解の研究

概要

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Surface melting which is one of the first-order phase transitions can occur on the surface of an ice crystal at temperatures just below its melting point (0°C) . Experiments were carried out to examine the properties of the quasi-liquid layer (surface melting layer) on both {0001} and {1010} faces of ice using an ellipsometry and an X-ray diffraction. As a result of ellipsometry, the critical temperatures of surface melting T8m were T8m (0001) =-2°C and T8m (1010) =-2 --4°C, and the refractive index of the quasi- liquid layer was 1.330 for both faces, which is very close to the refractive index of bulk water (1.3327 at 0°C) . On the other hand, the X- ray diffraction study showed that the long range order of the arrangement of water molecules disappears in the quasi- liquid layer. Physical properties of the surface melting are discussed on the basis of these experimental results.
日本結晶学会の論文