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Updated: May 12, 2026

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals

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Published on: August 15, 2018

Lattice Excitations with Finite Polarization and Magnetization.

Mike Pols¹, Carl P Romao², Dominik M Juraschek¹

¹Eindhoven University of Technology, Department of Applied Physics and Science Education, 5612 AP Eindhoven, Netherlands.

Physical Review Letters

|May 11, 2026

Summary

Researchers introduce multiferrons, novel quasiparticles with both electric and magnetic properties. These multiferrons exhibit dynamical multiferroicity, potentially observable through interactions with altermagnets or neutron probes.

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Area of Science:

Condensed Matter Physics
Materials Science
Quasiparticle Physics

Background:

Ferrons are quasiparticles representing elementary excitations of ferroelectric order.
Magnons are analogous quasiparticles that modulate and transport magnetization.

Purpose of the Study:

Introduce multiferrons, novel elementary excitations with coupled electric and magnetic character.
Investigate the properties and potential applications of multiferrons.

Main Methods:

Utilized first-principles calculations.
Studied the material Lithium Niobate (LiNbO3).

Main Results:

Multiferrons exhibit both electric and magnetic properties, leading to dynamical multiferroicity.
Electric polarization of multiferrons is perpendicular to equilibrium ferroelectric polarization.
Magnetization is parallel to equilibrium ferroelectric polarization.
Multiferrons carry net electric and magnetic quadrupole and octupole moments, termed multipolons.

Conclusions:

Multiferrons represent a new class of excitations with coupled electric and magnetic dynamics.
Multipolons could couple to internal multipolar degrees of freedom (e.g., altermagnets) or external probes (e.g., neutrons).
Coherent or thermal excitation of multiferrons may lead to observable phenomena.