Magnetoelectricity induced by rippling of magnetic nanomembranes and wires

Abstract

Magnetoelectric crystals have the interesting property that they allow electric fields to induce magnetic polarizations, and vice versa, magnetic fields to generate ferroelectric polarizations. Having such a magnetoelectric coupling usually requires complex types of magnetic textures, e.g., of spiralling type. Here we establish a novel approach to generate a linear magnetoelectric coupling in insulators with a conventional, ferromagnetic ground state. We show that nanoscale curved geometries lead to a reorganization of the magnetic texture that spontaneously breaks inversion symmetry and thereby induces macroscopic magnetoelectric multipoles. Specifically, we prove that structural deformation in the form of controlled ripples activate a magnetoelectric monopole in the recently synthesised two-dimensional magnets. We also demonstrate that in zig-zag shaped ferromagnetic wires in planar architectures, a magnetic toroidal moment triggers a direct linear magnetoelectric coupling.

5 pages, 4 figures

References in corpus (7)

• Magnetic 2D materials and heterostructures
• Towards a microscopic theory of toroidal moments in bulk periodic crystals
• Evidence of Flat Bands and Correlated States in Buckled Graphene Superlattices
• Electronic materials with nanoscale curved geometries
• Multiferroicity induced by dislocated spin-density waves
• Magnetoelectric classification of skyrmions
• Strong Dzyaloshinskii-Moriya Interaction in Monolayer CrI${}_3$ on Metal Substrates

Cited by in corpus (4)

• Curvature induced magnetization of altermagnetic films
• Manipulation by magnetic frustration in ferrotoroidal spin chains via curvature and torsion
• Quantized Toroidal Waves on Ferrotoroidal Magnets
• Modern triad for magnetic material science: geometric shape, electronic bands and spin textures