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Updated: Feb 8, 2026
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Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
Published on: August 15, 2018
9.2K
Strong magnetoelectric coupling effect in BaTiO3@CoFe2O4 magnetoelectric multiferroic fluids
Rongli Gao1, Qingmei Zhang, Zhiyi Xu
1School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, China. gaorongli2008@163.com chlfu@126.com.
Nanoscale
|June 21, 2018
Summary
New magnetoelectric multiferroic fluids were developed using composite nanoparticles. These fluids show tunable magnetic and electric properties, enabling electrical control of magnetization and vice versa for potential applications.
Area of Science:
- Materials Science
- Nanotechnology
- Condensed Matter Physics
Background:
- Magnetoelectric multiferroic materials offer unique coupling between magnetic and electric properties.
- Developing novel fluidic multiferroic systems is crucial for advanced applications.
Purpose of the Study:
- To develop and characterize magnetoelectric multiferroic fluids based on BaTiO3@CoFe2O4 composite nanoparticles.
- To investigate the influence of particle volume fraction and external fields on material properties.
Main Methods:
- Synthesis of BaTiO3@CoFe2O4 composite nanoparticles.
- Dispersion of nanoparticles in an insulating oil mixture.
- Systematic characterization of magnetic and ferroelectric properties under varying conditions.
- Measurement of magnetoelectric coupling coefficients.
Main Results:
- Observation of superparamagnetism and a superparaelectric state in the fluids.
- Increased remanent magnetization and coercive field with higher particle volume fraction and applied electric field.
- Increased remanent polarization and coercive field with applied magnetic field and volume fraction.
- High direct and converse magnetoelectric coupling coefficients (αE and αH).
Conclusions:
- Composite particles align under external fields, enabling control over magnetic and electric moments.
- These multiferroic fluids demonstrate potential for electrical control of magnetization and vice versa.
- The study highlights the promise of composite-particle-based multiferroic fluids for technological applications.
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