Comparative Study of the Ferroelectric Specific Heat in TGS and DTGS

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概要

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• A Comparative study has been made of the specific heat in single crystals of triglycine sulfate (TGS) and deuterated triglycine sulfate (DTGS). Measurements were performed (a) in the temperature interval 100-400 K, and (b) around the respective critical regions (at small temperature intervals ∼0.02℃). In the low temperature region, both experimental curves were almost coincident, and they showed a temperature dependence indicative of strong anomalous anharmonicity. The heats of transition (ΔQ=1.90±0.10 joule/g.) and entropy change (ΔS=(6.21±0.30)×10^<-3> joule/g℃) were almost the same for both crystals. The specific heat discontinuity was substantially different in both cases, ΔC_p=0.24±0.03 joule/g℃ for TGS, and ΔC_p=0.48±0.03 joule/g℃ for DTGS. Calculations based on both the thermodynamic theory and the statistical theory of ferroelectrics show fair agreement with the data.

• 社団法人日本物理学会の論文
• 1975-08-15

著者

• Gonzalo J.

  Naclear Science Section Puerto Rico Nuclear Center And Physics Department University Of Puerto Rico

• CAMNASIO Anibal

  Nuclear Science Section, Puerto Rico Nuclear Center, and Physics Department, University of Puerto Ri

• Camnasio Anibal

  Nuclear Science Section Puerto Rico Nuclear Center And Physics Department University Of Puerto Rico

• Gonzalo J.A.

  Naclear Science Section, Puerto Rico Nuclear Center, and Physics Department, University of Puerto Rico

関連論文

• Comparative Study of the Ferroelectric Specific Heat in TGS and DTGS

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