Brillouin Scattering Study on Lithium Ammonium Tartrate Monohydrate in Paraelectric Phase
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概要
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The Brillouin scattering studies on lithium ammonium tartrate monohydrate(LAT) have been made in raraelectric r>hase. The elastic stiffness constants CP,and C'?s vanish at To=94.5 K and T.=97.5 K, resr>ectivelv. Some R aman scatter..inu srectroscories of this crvstal have been also made. From the rhenomenologicaltheory and the discussion of the elastic dispersion, LAT has been concluded toundergo the proper ferroelastic transition, or, the soft mode in LAT is an acousticphonon of which energy is determined by C: 5 . Measurements of refractive indicesat room temperature are reported.
- 社団法人日本物理学会の論文
- 1978-06-15
著者
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Udagawa Masayuki
School Of Science And Engineering Waseda Universiry
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Udagawa Masayuki
School Of Science And Engineering Waseda University
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NAKAMURA Terutaro
The Institute for Solid State Physics,Tokyo University
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KOHN Kay
School of Science and Technology,Waseda University
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Kohn Kay
School Of Science And Engineering Waseda University
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Nakamura Terutaro
The Institute For Soild State Physics The University Of Tokyo:department Of Electronics Tokai Univer
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Nakamura Terutaro
The Institute for Solid State Physics,The University of Tokyo
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