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Abstract
Phase fluctuations and fluctuons (phasons) in ferroelectric-ferromagnetic systems are considered. There are two fluctuating ordering parameters in this case—magnetization and polarization. All possible stable solutions are analyzed and the set of formative stable quasi-particles in the classical linear appoximation is determined. Expressions for the radii, values of polarization and magnetization, energies of quasi-particles in the vicinity of the first-order phase transitions are obtained.