Determination of Landau free-energy parameters by dielectric measurements in the ferroelectric TSCC
Schmidt, V. Hugo
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The authors measured the adiabatic dielectric permittivity epsilon b of tris-sarcosine calcium chloride (TSCC) at 400 Hz near the ferroelectric transition for DC bias fields up to 5000 V cm-1. They found epsilon infinity =4.2+or-0.2, Curie-Weiss constant C+=38.3+or-0.3K, T0=129.4+or-0.1K, and Landau coefficients A=(2.95+or-0.2)*109 V m A-1 s-1 K-1 and B=(3.5+or-0.1)*1015 V m5 A-3 s-3. They observed evidence of an internal bias field as reported previously by others.
J. Bornarel and V.H. Schmidt, â€œDetermination of Landau free-energy parameters by dielectric measurements in the ferroelectric TSCC,â€� Journal of Physics C: Solid State Physics. 14, 2017-2025 (1981)