Specific heat of NH4Br and NH4BrxCl1−x crystals close to the antiferroelectric transition
作者： H. Yurtseven , A. Yanik
DOI: 10.1063/1.1989427
关键词: Antiferroelectricity 、 Critical exponent 、 Heat capacity 、 Thermodynamics 、 Ising model 、 Condensed matter physics 、 Ammonium compounds 、 Specific heat 、 Materials science 、 General Physics and Astronomy
摘要: We calculate the specific heat CVI of NH4Br and mixed crystals NH4BrxCl1−x using Ising model for transition between disordered (D) antiferro- (AF) electric phases in these crystalline systems. Our values, which we calculated xBr=1, 0.26, 0.51 are good agreement, both below above TC, with observed CP data from literature. value ɑ≅0.1 (T TC) critical exponent agrees 0.125 predicted by a three-dimensional model.
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