Terahertz magnetoelectric response via electromagnons in magnetic oxides

TL;DR

This paper explores the terahertz magnetoelectric response in magnetic oxides, focusing on electromagnons, their underlying mechanisms, and potential applications in spin-electronics, highlighting recent experimental and theoretical insights.

Contribution

It provides a detailed discussion of electromagnon activity in perovskite manganites and hexaferrites, emphasizing the symmetric exchange mechanism as a key factor.

Findings

Electromagnons can be driven by terahertz electric fields in magnetic oxides.

Terahertz magnetochromism has been demonstrated in hexaferrites.

Symmetric exchange mechanism explains electromagnon activity in studied materials.

Abstract

Terahertz magnetic resonance driven by the light electric field, now referred to as electromagnon, has stimulated interest due to its strong candidate for future spin-electronics. One unique characteristic of electromagnons is the terahertz magnetochromism, a color change by external magnetic field, as recently demonstrated in the hexaferrite. By taking perovskite manganites and hexaferrite as model cases, the current understating of the electromagnon activity is discussed in terms of the symmetric exchange mechanism.