Electric-Field Control of Magnon Gaps in a Ferromagnet using a Spatially-Periodic Electric Field

Abstract

The frequencies and linewidths of spin waves in one-dimensional (1D) and two-dimensional (2D) periodic superlattices of magnetic materials are found, using the Landau-Lifshitz-Gilbert equations. The form of the exchange¯eld from a surface-torque-free boundary between magnetic materials is derived, and magnetic-material combinations are identi¯ed which produce gaps in the magnonic spectrum across the entire superlattice Brillouin zone for hexagonal and square-symmetry superlattices. The magnon gaps and spin-wave dispersion properties of a uniform magnetic material under the in°uence of a periodic electric¯eld are presented. Such results suggest the utility of magnetic insulators for electric-¯eld control of spin-wave propagation properties.

Dynamic electromagnonic crystals based on ferrite-ferroelectric thin film multilayers

“…A more challenging, but more energy-efficient approach is to utilize the electric-field controlled crystals [23][24][25][26].…”

Electromagnonic crystals based on ferrite–ferroelectric–ferrite multilayers

“…Further progress in the development of voltage‐controlled novel devices can be achieved by fabrication of the layered structures based on MCs [13–25]. In particular, an electrodynamic interaction between high‐frequency electromagnetic and spin waves leads to a formation of the hybrid spin‐electromagnetic waves (SEWs) in the ferrite–ferroelectric layered structures [26–33].…”

Dynamic electromagnonic crystal based on artificial multiferroic heterostructure

“…The more challenging, but more energy-efficient approach is to utilize the electric-fieldcontrolled DMCs. So far, only a few theoretical studies have been performed on this subject [25][26][27][28] .…”