Spectrum of Coupled Waves in Orthorhombic Multiferroics With Cycloidal Antiferromagnetic Structure in External Electric and Magnetic Fields

TL;DR

This paper calculates the spectrum of coupled waves in orthorhombic multiferroics with cycloidal antiferromagnetic structure, showing how external electric and magnetic fields can control their electrodynamic properties.

Contribution

It provides a detailed analysis of wave spectra and susceptibilities in multiferroics under external fields, revealing tunable band structures.

Findings

Wave spectrum has a band structure with field-dependent width and frequency.

External fields can control the electrodynamic properties of multiferroics.

Susceptibilities vary with frequency and external field strength.

Abstract

Spectrum of coupled spin, acoustic, electro-dipole and electromagnetic waves in orthorhombic perovskite multiferroics placed in external electric and magnetic field has been calculated. Frequency and field dependencies of electric, magnetic, and magnetoelectric susceptibilities of multiferroics with cycloidal antiferromagnetic structure in external electric and magnetic fields have been investigated as well. The spectrum of coupled waves has a band structure. Width and frequency ranges of bands depend on external fields. The possibility of control of electrodynamic properties of orthorhombic perovskite multiferroics with cycloidal antiferromagnetic structure by external electric and magnetic fields has been shown.