Observation, evidence and origin of magntodielectric effect in Mn/Fe doped LaGaO3

Abstract

Magnetodielectric (MD)/magnetoelectric (ME) materials and/or multiferroics are of very high research interest due to their potential possible applications and interesting physics. Multiferroics are the materials which exhibit coexistence of at least two primary ferroic orders$ (amongst ferroelectric, ferromagnetic and ferroelastic orderings) in a single phase compound [1–19]. However, single-phase multiferroic materials are rarely exist [1,11] and multiferroicity has been reported also in composites or two-phase materials [1,16,20–23]. Similar to the work which reveals that magnetic order can create superconductivity [1,24], it has also been reported that magnetic ordering may also induce ferroelectricity [1,13] and vice versa. Multiferroics can be expanded also to include non-ferroic magnetic orderings such as ferrimagnetism and antiferromagnetism. Further, multiferroics are divided into two groups [8]. The first group, which can be categorized as type-I multiferroics, covers those materials in which magnetism and ferroelectricity has different origin and appears independently of one another, though there may be a little (weak) coupling between them.