Dielectric, Thermal and Optical Studies of Phase Transitions in TIH_2AsO_4 Single Crystal
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概要
- 論文の詳細を見る
Dielectric, specific heat and X-ray measurement in the single crystals of TlH_2AsO_4 were carried out in a temperature range between 80 K and 400 K, and its domain structures were observed. It was found that TlH_2AsO_4 is ferroelastic below 391 K (T) with the spontaneous strain x_<5S>=4.2×10^<-2> at 293 K. TlH_2AsO_4 has two distinct domain structures at room temperature ; one is the domain structure with the (100) and/or (001) domain boundaries which disappears above T_I and the other is the structure with the (201) domain boundary which has no relation with the phase transition. The crystal belongs to a monoclinic system with the space group P2_1/ a in the room temperature phase and an orthorhombic system with the space group Pcan above T_I. It is suggested that the ferroelastic phase transition at T_I may be caused by an instability of acoustic B_<2g> mode.
- 社団法人日本物理学会の論文
- 1994-03-15
著者
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KOMUKAE Masaru
Department of Applied Physics, Faculty of Science, Science University of Tokyo
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OSAKA Toshio
Department of Applied Physics, Faculty of Science, Science University of Tokyo
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Osaka T
Tokyo Univ. Sci. Tokyo
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Osaka Toshio
Department Of Applied Physics Faculty Of Science Tokyo University Of Science
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Osaka Toshio
Department Of Applied Physics Faculty Of Science Science University Of Tokyo
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Komukae M
Tokyo Univ. Sci. Tokyo
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Komukae Masaru
Department Of Applied Physics Faculty Of Science Science University Of Tokyo
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MAKITA Yasuharu
Department of Applied Physics,Faculty of Science,Science University of Tokyo
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Irokawa Katsumi
Department of Applied Physics, Faculty of Science, Science University of Tokyo
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Komukae M
Department Of Applied Physics Faculty Of Science Tokyo University Of Science
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Irokawa Katsumi
Department Of Applied Physics Faculty Of Science Science University Of Tokyo
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Makita Yasuharu
Department Of Applied Physics Faculty Of Science Science University Of Tokyo
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