The investigation of the magnetodielectric effect in multiferroic ferroelectromagnets
Department of Physics, Suzhou University, Suzhou, 215006,
Corresponding author: a email@example.com
Revised: 8 November 2004
Published online: 15 March 2005
In multiferroic ferroelectromagnets, microscopic coupling interaction between the ferroelectric and magnetic order results in the macroscopic correlation between the dielectric and magnetic properties, which is defined as magnetodielectric effect. If we classify multiferroic ferroelectromagnets as two kinds: ferroelectric-ferromagnets and ferroelectric-antiferromagnets, we find the magnetodielectric behavior of these two kinds of ferroeletromagnets show obvious difference. We analyze the origin of the different magnetodielectric behavior and find that the fluctuation of the spin-pair correlation plays a critical role. Soft-mode theory based on DIFFOUR model and the mean-field theory are combined to deal with multiferroic ferroelectromagnetic system.
PACS: 77.80.-e – Ferroelectricity and antiferroelectricity / 75.80.+q – Magnetomechanical and magnetoelectric effects, magnetostriction / 77.22.-d – Dielectric properties of solids and liquids
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2005