Magnetoelectric Effect in Dipolar Clusters.

Paula Mellado, Physics Professor, Adolfo Ibáñez University, Santiago, Chile.
https://sites.google.com/site/pmelladouai/

Abstract

We combine the anisotropy of magnetic interactions and the point symmetry of finite solids in the study of dipolar clusters as new basic units for multiferroics metamaterials. The Hamiltonian of magnetic dipoles with an easy axis at the vertices of polygons and polyhedra maps exactly into a Hamiltonian with symmetric and antisymmetric exchange couplings. The last one gives rise to a Dzyaloshinskii-Moriyacontribution responsible for the magnetic modes of the systems and their symmetry groups, which coincide with those of a particle in a crystal field with spin-orbit interaction. We find that the clusters carry spin current and that they manifest the magnetoelectric effect. We expect our results to pave the way for the rational design of magnetoelectric devices at room temperature.

Miércoles 12 de mayo, 16:00 hrs.

Link Zoom: https://us02web.zoom.us/j/93451978812?pwd=VkhZY0hIb1RjNzgvU01WK2oxQVYzdz

Ver afiche: Seminario Profesora Paula Mellado 12-05-2020