Study of thermodynamic fluctuations of two-dimensional multiferroic systems using the renormalized Gaussian approach

Abstract

In this paper, we investigate the influence of the thermodynamic fluctuations of order parameters and their coupling on the physical quantities of a 2D-multiferroic system using the renormalized Gaussian approach. Correction to magnetization, polarization, inverse susceptibilities, correlation lengths, specific heat, and critical temperatures are found taking into account order parameters thermodynamic fluctuations and their coupling. The specific heat exhibits two λ-type anomalies; this highlights second-order phase transitions in the system. The results obtained from this approach are in good accordance with the experimental ones found in the literature.

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Tongue, M.G.E., Fotue, A.J., Tsiaze, R.M.K. et al. Study of thermodynamic fluctuations of two-dimensional multiferroic systems using the renormalized Gaussian approach. Eur. Phys. J. Plus 136, 199 (2021). https://doi.org/10.1140/epjp/s13360-021-01178-5

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