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Updated: Jun 2, 2026
07:03
Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
Published on: August 15, 2018
Magnetic control of ferroelectric interfaces.
S Dussan1, A Kumar, R S Katiyar
1Department of Physics, University of Puerto Rico, San Juan, PR 00931, USA.
Summary
Ferroelectric lead zirconate titanate (PZT) films on half-metallic lanthanum strontium manganese oxide (LSMO) electrodes show strong magnetic field dependence. Increasing magnetic fields cause PZT hysteresis loops to broaden and disappear due to LSMO
Area of Science:
- Condensed Matter Physics
- Materials Science
- Multiferroics
Background:
- Ferroelectric materials exhibit spontaneous electric polarization.
- Half-metallic oxides display unique magnetic and electronic properties.
- The interplay between ferroelectricity and magnetism is crucial for novel device applications.
Purpose of the Study:
- To investigate the magnetic field dependence of ferroelectric PbZr(0.52)Ti(0.48)O(3) (PZT) films.
- To understand the underlying mechanisms influencing the ferroelectric properties under magnetic fields.
- To compare experimental results with theoretical models.
Main Methods:
- Fabrication of PZT films on LSMO electrodes.
- Measurement of ferroelectric hysteresis loops under varying magnetic fields (H).
- Analysis of leakage current and magnetoresistance effects.
Main Results:
- Strong magnetic field dependence observed in PZT/LSMO heterostructures.
- Ferroelectric hysteresis loops broaden and disappear at approximately 0.34 T.
- Results attributed to negative magnetoresistance in LSMO, increasing PZT leakage current.
Conclusions:
- The observed phenomena are primarily driven by magnetic field-induced changes in the LSMO electrode, not direct magnetocapacitance.
- Sharp negative magnetoresistance in LSMO significantly impacts ferroelectric behavior.
- This study provides insights into the magnetoelectric coupling in PZT/LSMO systems.
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