Role of the BaTiO3 polarization reversal in the magnetic structure of CaMnO3

GRAF, MÓNICA ELISABET; LLOIS, ANA MARÍA; DI NAPOLI, SOLANGE; BARRAL, MARÍA ANDREA

Mainz

Simposio; 9th JEMS Conference 2018; 2018

European Magnetism Association

The presence of a strong coupling between magnetism and ferroelectricity enables the conception of a new family of electronic devices where magnetism is controlled through electric fields, or viceversa. One route towards the development of multiferroic materials is by exploring the break of time reversal and space inversion symmetries that occur at the interface between a magnetic and a ferroelectric material. This engineered magnetoelectric coupling could reach values that are orders of magnitude larger than those typical of single phase multiferroics. Furthermore, the properties of each component of the heterostructures can be chosen within a large number of materials, allowing a better optimization of the desired properties. In this work we obtain, by means of ab initio calculations, the structural, electronic and magnetic properties of BaTiO3/CaMnO heterostructures. We study the effect of reversing the ferroelectric polarization of BaTiO3 on the magnetic structure of CaMnO3, by analyzing the charge transfer through the interface for different interface combinations, namely BaO-MnO2 and TiO2-CaO.