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Updated: Sep 20, 2025
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Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
Published on: August 15, 2018
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Multilevel polarization switching in ferroelectric thin films.
Martin F Sarott1, Marta D Rossell2, Manfred Fiebig3
1Department of Materials, ETH Zurich, CH-8093, Zurich, Switzerland. martin.sarott@mat.ethz.ch.
Nature Communications
|June 7, 2022
Summary
Ferroic materials can now be precisely controlled at the nanoscale. This study demonstrates arbitrary setting of remanent ferroelectric polarization in ultrathin films, enabling non-binary switching for advanced nanoelectronics.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Ferroic materials exhibit binary states, limiting applications requiring continuous responses.
- Nanoscale tunability of ferroic states is crucial for advanced oxide nanoelectronics.
Purpose of the Study:
- To demonstrate arbitrary control of remanent ferroelectric polarization at the nanoscale.
- To explore non-binary switching in ferroic materials for enhanced device functionality.
Main Methods:
- Utilizing ultrathin epitaxial lead zirconate titanate (PbZr0.52Ti0.48O3) films.
- Engineering a dense pattern of decoupled nanometric 180° domains with a broad coercive-field distribution.
- Leveraging the instability at the morphotropic phase boundary and epitaxial strain.
Main Results:
- Achieved arbitrary setting of remanent ferroelectric polarization in nanometric dimensions.
- Demonstrated multilevel switching through phase competition near the morphotropic phase boundary.
- Showcased quasi-continuous tunability of non-linear optical response and tunnel electroresistance.
Conclusions:
- Arbitrary nanoscale control of ferroelectric polarization is achievable, moving beyond binary states.
- Non-binary switching in ferroic materials offers new degrees of freedom for nano-control.
- This approach has significant technological implications for tunable optical and electronic devices.
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