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Temperature Dependence of the Spontaneous Polarization and the Dielectric Susceptibility near the Phase Transitions in Ammonium Sulfate
Date
2010-01-01
Author
Sen, S.
Yurtseven, Hasan Hamit
Kavruk, D.
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Spontaneous polarization and the dielectric susceptibility are calculated as a function of temperature close to the paraelectric-ferroelectric phase transition (T-C=223 K) in (NH4)(2)SO4 This calculation is performed using a mean field model by fitting the expressions derived for the dielectric susceptibility to the experimental data for the dielectric constant at the fixed frequencies of 100, 500 and 2000 Hz in ammonium sulfate
Subject Keywords
Spontaneous polarization
,
Dielectric susceptibility
URI
https://hdl.handle.net/11511/54355
Journal
HIGH TEMPERATURE MATERIALS AND PROCESSES
Collections
Department of Physics, Article
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Temperature dependences of the spontaneous polarization and the dielectric constant are calculated near the paraelectric-ferroelectric (cubic-tetragonal) transition in BaTiO3 using our mean field model. By expanding the free energy in terms of the spontaneous polarization (order parameter), expressions for the temperature dependence of the spontaneous polarization and the dielectric constant are derived. By considering the temperature dependence of the Raman frequencies for the lattice mode (310 cm(-1)) whi...
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S. Sen, H. H. Yurtseven, and D. Kavruk, “Temperature Dependence of the Spontaneous Polarization and the Dielectric Susceptibility near the Phase Transitions in Ammonium Sulfate,”
HIGH TEMPERATURE MATERIALS AND PROCESSES
, pp. 259–268, 2010, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/54355.