Effect of transverse magnetic correlations on a coupled order parameter: Shifted transition temperatures and thermal hysteresis

Abstract

We use a Green's function method with Random Phase Approximation to show how magnetic correlations may affect electric polarization in multiferroic materials with magnetic-exchange-type magnetoelectric coupling. We use a model spin 1

Effects of magnetic correlation on the electric properties in multiferroic materials

“…This conclusion, however, is different from that in Ref. [11] where the MLC was neglected in the coupling term, and it was believed that MTC reduced the phase transition temperature of the electric subsystem.…”

“…Magnetization is zero when temperature is above the T m , and the MC is as well. In other studies using the method of double-time Green's function, the MTC was nonzero [9,11], and it can influence the electric properties above the T m [11]. The MLC was usually decoupled directly as [34] …”

“…The effect of magnetoelectric coupling is particularly strong when temperature is close to or just below magnetic phase transition temperature and may result in a change of electric properties [4][5][6]. In recent studies, it has been found that pair correlation between magnetic lattice sites, hereafter referred to as magnetic correlation for brevity, played an important role on the electric properties [7][8][9][10][11], and there have been theoretical works devoted to the investigations of this effect [11][12][13][14][15][16].…”

Rigorous numerical study of strong microwave photon-magnon coupling in all-dielectric magnetic multilayers

“…Thus, before we proceed to the discussion of the main results of our work, we would like to additionally highlight the novelty of our results with respect to those presented in previous works: 1) Previous works Refs. [20,[42][43][44][45][46][47][48][49][50][51] demonstrated the existence of spinelectromagnetic waves in multilayered structures consisting of a YIG film combined with a ferroelectric or piezoelectric materials. In such structures, a spin-electromagnetic wave results from anti-crossing interaction between a spin wave in the YIG film and an electromagnetic wave propagating mostly in the electrically controlled layer.…”

Terahertz Dielectric Response and Coupled Dynamics of Ferroelectrics and Multiferroics From Effective Hamiltonian Simulations

“…This second peak therefore corresponds to the so-called optic antiferromagnetic mode of Ref. 85 and to the high-frequency gapped mode of Ref. 84 .…”