Abstract
Experimental results showed the significant impact of ferromagnetic nanoparticles on the smectic-A to chiral smectic-C∗ (SmA-SmC∗) phase transition. This article presents the thermodynamical description in the mixture of ferroelectric liquid crystal and ferromagnetic nanoparticles. The model is based on Flory-Huggins free energy of isotropic mixing and Landau free energy. The impact of ferromagnetic nanoparticles on the spontaneous polarization, tilt angle, transition temperature and dielectric susceptibility near the SmA-SmC∗ phase transition is discussed. Various topologies in the phase diagrams are discussed clearly. Both the qualitative quantitative agreement between experiments and theory are observed.
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