Structural Study of Tetragonal-Orthorhombic Phase Transition in NH_4SCN
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概要
- 論文の詳細を見る
The crystal structures of NH.SCN are determined in the tetragonal phase I (l22'C)and the orthorhombic phase II (100'C, 110'C and 115'C) from X-ray diffractiondata. In phase I, SCN ton is in disordered state taking two equivalent configura-tions. In phase II, the ordering of SCN ion correlates to the spontaneous displace-ment of NH.' ton. X-ray critical diffuse scattering is observed at the Z-point of theBrillouin-zone boundary in phase I and critical temperature is determined to be1l7'C. The I-II phase transition is explained by a coupling system between the orien-tational disorder and the phonon.[ammonium thiocyanate, NH.SCN, phase transition, crystal structure, diffuse ]] scatteringl
- 社団法人日本物理学会の論文
- 1990-03-15
著者
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Yamamoto Seishi
Department Of Physics Faculty Of Literature And Science Yamaguchi University
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Shinnaka Yasuhiro
Department Of Physics Faculty Of Literature And Science Yamaguchi University
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Hamada Akira
Department Of Engineering Tokai University
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Hamada Akira
Department Of Physics Faculty Of Science Yamaguchi University
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SHINNNAKA Yasuhiro
Department of Physics,Faculty of Science,Yamaguchi University
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Shinnnaka Yasuhiro
Department Of Physics Faculty Of Science Yamaguchi University
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