Abstract

Triglycine fluoberyllate (TGFB) is an important member of hydrogen bonded order disorder type ferroelectrics, resembling other ferroelectrics which belongs to its group it experiences phase transition at certain temperature. In current theoretical work by utilizing Green’s function (double time thermal dependent) and modified pseudospin two-sublattice mode model we are analyzing ferroelectric behavior of TGFB crystal. For this purpose we are evaluating expressions for shift ( Δ ) , width ( Γ ) , soft mode frequency ( Ω ̂ ) , dielectric constant ( ε ) and loss tangent ( tan δ ) , after that by utilizing model values for TGFB crystal thermal dependence of Ω ̂ , ε and tan δ have been calculated. Comparison illustrates that theoretical results obtained by us are in good harmony with experimental results.

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