1 research outputs found
Concomitant Light-Reversible Magnetic Response in Multiferroic Oxide Heterostructures for Multiphysics Applications
The concept of multiphysics, where materials respond
to diverse
external stimuli, such as magnetic fields, electric fields, light
irradiation, stress, heat, and chemical reactions, plays a fundamental
role in the development of innovative devices. Nanomanufacturing,
especially in low-dimensional systems, enhances the synergistic interactions
taking place on the nanoscale. Light–matter interaction, rather
than electric fields, holds great promise for achieving low-power,
wireless control over magnetism, solving two major technological problems:
the feasibility of electrical contacts at smaller scales and the undesired
heating of the devices. Here, we shed light on the remarkable reversible
modulation of magnetism using visible light in epitaxial Fe3O4/BaTiO3 heterostructure. This achievement
is underpinned by the convergence of two distinct mechanisms. First,
the magnetoelastic effect, triggered by ferroelectric domain switching,
induces a proportional change in coercivity and remanence upon laser
illumination. Second, light–matter interaction induces charged
ferroelectric domain walls’ electrostatic decompensations,
acting intimately on the magnetization of the epitaxial Fe3O4 film by magnetoelectric coupling. Crucially, our experimental
results vividly illustrate the capability to manipulate magnetic properties
using visible light. This concomitant mechanism provides a promising
avenue for low-intensity visible-light manipulation of magnetism,
offering potential applications in multiferroic devices