Question: Dielectric constant below transition temperature in terms of the parameters in the Landau free energy expansion, show that for a second-order phase transition the dielectric

Dielectric constant below transition temperature in terms of the parameters in the Landau free energy expansion, show that for a second-order phase transition the dielectric constant below the transition temperature is ε = 1 + 4πΔP/E = 1 + 2π/γ(T_c – T). This result may he compared with (44) above the transition.

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