High frequency susceptibility of a weak ferromagnet with magnetostrictive magnetoelectric coupling: using heterostructures to tailor electromagnon frequencies

Abstract

In the first part of this work we calculate the high frequency magnetoelectric susceptibility of a simultaneously ferroelectric and canted antiferromagnetic (also know as weak ferromagnetic) thin film with magnetostrictive magnetoelectric coupling. We show that a dynamic coupling exists between the ferroelectric and optic antiferromagnetic excitations. In the second part of the paper, we calculate using an effective medium method the susceptibility of a heterostructure comprising alternating thin films of such a material together with a ferromagnet. Dipolar magnetic fields serve to couple the ferromagnetic and optic antiferromagnetic modes, which in turn couples the ferromagnetic and ferroelectric excitations. This provides a mechanism for creating "electromagnon" modes in the microwave regime which may be useful for applications.

References in corpus (5)

• Weak ferromagnetism and magnetoelectric coupling in bismuth ferrite
• Structural distortion and magnetism of BiFeO3 epitaxial thin films: a Raman spectroscopy and neutron diffraction study
• Observation of electromagnon excitations in the BiFe0${}_3$ spiral magnet
• Electrical control of magnon propagation in multiferroic BiFeO3 films
• Comment on "Ferroelectrically Induced Weak Ferromagnetism by Design", C. Fennie, PRL 100, 167203 (2008)

Cited by in corpus (4)

• Room-temperature paramagnetoelectric effect in magnetoelectric multiferroics Pb(Fe1/2Nb1/2)O3 and its solid solution with PbTiO3
• Strain-mediated magnetoelectric coupling in magnetostrictive/piezoelectric heterostructures and resulting high frequency effects
• Rigorous numerical study of strong microwave photon-magnon coupling in all-dielectric magnetic multilayers
• Optical reflectivity and magnetoelectric effects on resonant plasmon modes in composite metal-multiferroic systems