Study of thermodynamic fluctuations of two-dimensional multiferroic systems using the renormalized Gaussian approach
Laboratory of Condensed Matter-Electronics and Signal Processing, Department of Physics, Faculty of Science, University of Dschang, P.O. Box 479, Dschang, Cameroon
2 International Chair in Mathematical Physics and Applications, (ICMPA-UNESCO Chair), University of Abomey-Calavi, 072 P O Box 50, Cotonou, Republic of Benin
3 Laboratory of Mechanics, Materials and Structures, Faculty of Science, University of Yaoundé I, P.O. Box 812, Yaoundé, Cameroon
Accepted: 30 January 2021
Published online: 10 February 2021
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.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2021