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Updated: May 7, 2026
07:03
Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
Published on: August 15, 2018
Dynamics of localized modes in a composite multiferroic chain.
L Chotorlishvili1, R Khomeriki, A Sukhov
1Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, D-06120 Halle/Saale, Germany.
Physical Review Letters
|October 1, 2013
Summary
Localized magnetic or ferroelectric modes (LM) can transmit across ferroelectric-ferromagnetic interfaces above a threshold amplitude. Noise can induce transmission below this threshold, similar to stochastic resonance, enabling new logic applications.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Nanotechnology
Background:
- Controlling the propagation of localized magnetic or ferroelectric modes (LM) in composite multiferroic systems is crucial for advanced applications.
- Understanding the dynamics of LMs at ferroelectric-ferromagnetic interfaces is key, especially when their frequencies fall within specific material band gaps.
Purpose of the Study:
- To investigate the conditions for the transmission of in-band ferroelectric LMs across a ferroelectric-ferromagnetic interface.
- To explore the role of amplitude and noise in mediating LM propagation and potential stochastic resonance effects.
Main Methods:
- Theoretical modeling of coupled ferroelectric-ferromagnetic systems.
- Analysis of localized mode dynamics and interface transparency based on system parameters.
- Investigation of noise-induced transmission phenomena.
Main Results:
- A critical amplitude threshold was identified, above which ferroelectric LMs can penetrate the ferromagnetic material.
- Below the threshold, LMs are completely reflected, but noise can induce transmission within a specific range.
- This noise-induced transmission exhibits characteristics of stochastic resonance.
Conclusions:
- The study demonstrates a mechanism for controlling LM propagation across multiferroic interfaces via amplitude and noise.
- Findings pave the way for developing novel logic devices based on ferroelectric and ferromagnetic localized modes.
- The observed stochastic resonance-like effect offers new possibilities for signal processing in multiferroic heterostructures.
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