Related Experiment Video
Updated: Nov 5, 2025
07:42
Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains
Published on: July 20, 2022
3.0K
Voltage-Controlled Reconfigurable Magnonic Crystal at the Sub-micrometer Scale
Hugo Merbouche1, Isabella Boventer1, Victor Haspot1
1Unité Mixte de Physique CNRS, Thales, Université Paris-Saclay, 91767 Palaiseau, France.
ACS Nano
|May 20, 2021
Summary
Researchers developed a novel voltage-controlled magnonic system using multiferroics and ferromagnets. This breakthrough enables on-demand reconfigurability for advanced spin wave devices, paving the way for nanomagnonics integration.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Nanotechnology
Background:
- Multiferroic materials offer voltage control for nanoscale systems.
- Magnonics utilizes spin waves for logical and analog functions.
- Nanomagnonics aims for large-scale integration of magnonic devices.
Purpose of the Study:
- To demonstrate a compact, voltage-controlled, and reconfigurable magnonic system.
- To combine multiferroics with ferromagnets in an epitaxial heterostructure.
- To achieve on-demand control over spin wave propagation.
Main Methods:
- Fabrication of a fully epitaxial heterostructure combining multiferroic BiFeO3 and ferromagnetic La2/3Sr1/3MnO3.
- Imprinting remnant electrical polarization in BiFeO3 with 500 nm periodicity.
- Characterization of spin wave propagation spectrum using magnetoelectric coupling.
Main Results:
- Demonstrated modulation of the effective magnetic field in the La2/3Sr1/3MnO3 waveguide.
- Observed robust magnonic band gap formation in the voltage-induced magnonic crystal.
- Achieved >20 dB rejection in the magnonic band gap, confirming effective control.
Conclusions:
- Successfully created a voltage-controlled and reconfigurable magnonic system.
- The magnetoelectric coupling enables dynamic control over spin waves.
- This work is a significant step towards large-scale integration of nanomagnonic devices.
