Structural Phase Transition in K_2SeO_4
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概要
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X-ray scattering from K_sSeO_4 crystal at temperatures near T_m=129.5 K is measured to elucidate the nature of the mechanism of the structural phase transition. On approaching T_m the super-lattice reflection at (2/3, 0, 4) decreases slowly, indicating that the transition at T_m is of the second order. The diffuse intensity near (2/3, 0, 4) increases near T_m and its distribution shows a strong anisotropy elongating along the a^*-direction. It is suggested that the transverse optical phonon polarized along the c-direction softens at q=(2π/3a, 0, 0) near T_m.
- 社団法人日本物理学会の論文
- 1975-08-15
著者
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Terauchi Hikaru
Faculty Of Science Kwansei Gakuin University
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Terauchi Hikaru
Faculty Of Science Kansei Gakuin University
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Takenaka Hisataka
Faculty Of Science Kwansei Gakuin University
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SHIMAOKA Kohji
Department of Physics, Ritsumeikan University
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Shimaoka Kohji
Department Of Physics Ritsumeikan University
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