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Updated: Jun 17, 2026

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
Published on: August 15, 2018
Ferroelectric control of spin polarization
1Unité Mixte de Physique CNRS/Thales, 1 Avenue Augustin Fresnel, Campus de l'Ecole Polytechnique, 91767 Palaiseau, France.
Researchers demonstrate a novel method for controlling electron spin polarization using ferroelectric tunnel junctions. This breakthrough offers a low-power, nonvolatile approach for spintronic devices, overcoming limitations in magnetic writing.
Area of Science:
- Spintronics
- Condensed Matter Physics
- Materials Science
Background:
- Spintronics faces challenges with high power requirements for magnetic writing compared to nanoelectronics.
- Previous attempts to electrically control magnetic properties yielded small, volatile effects.
Purpose of the Study:
- To demonstrate a method for local, large, and nonvolatile control of carrier spin polarization.
- To explore the potential of ferroelectric tunnel junctions for low-power spintronic applications.
Main Methods:
- Utilized ferroelectric tunnel junctions with ferromagnetic electrodes.
- Employed electrical switching of ferroelectric polarization to modulate spin polarization.
Main Results:
- Achieved local, large, and nonvolatile control of carrier spin polarization.
- Demonstrated a giant interfacial magnetoelectric coupling effect.
Conclusions:
- Ferroelectric switching offers a viable low-power approach for spin-based information control.
- This work paves the way for more energy-efficient spintronic technologies.
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