1209.2819 (V. V. Kabanov et al.)

Magnetoelectric Behavior due to Phase Separation and Charge Localized
States    [PDF]

V. V. Kabanov, R. F. Mamin

We develop a theory of the magnetoelectric effects which appears in the vicinity of the second order phase transition in the low doped manganites as a result of the long range Coulomb forces. The long range Coulomb interactions is responsible for the formation of the inhomogeneous charged states and determines the characteristic length scales. We derive the phase diagram of the inhomogeneous charged states in the framework of the phenomenological theory of phase transitions. The large value of static dielectric function reduces characteristic value of the Coulomb energy of the inhomogeneous state and makes the appearance of the magnetoelectric effect possible.

View original: http://arxiv.org/abs/1209.2819