Gate-controlled magnon-assisted switching of magnetization in ferroelectric/ferromagnetic junctions

摘要

Interfacing a ferromagnet with a polarized ferroelectric gate generates a nonuniform, interfacial spin density coupled to the ferroelectric polarization. This coupling allows for an electric field control of the effective field acting on the magnetization. To unravel the usefulness of this interfacial magnetoelectric coupling we investigate the magnetization dynamics of a ferroelectric/ferromagnetic multilayer structure using the Landau-Lifshitz-Baryakhtar equation. The results demonstrate that the interfacial magnetoelectric coupling is utilizable as a highly localized and efficient tool for manipulating magnetism by electrical means. Ways of enhancing the strength of the interfacial coupling and/or its effects are discussed.