Polar toron structure in ferroelectric core-shell nanoparticles

Lich, Le Van; Dang, Ha Thi; Dinh, Van‐Hai

doi:10.1016/j.scriptamat.2023.115641

Scripta Materialia

2023

DOI: 10.1016/j.scriptamat.2023.115641

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Polar toron structure in ferroelectric core-shell nanoparticles

Le Van Lich

Ha Thi Dang

Van‐Hai Dinh

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2024

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Cited by 2 publications

References 35 publications

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3D Topological Toron‐Like Domains in Magnetic Nanoparticles: A Micromagnetic Simulation

Dong,

Liang,

Guo

et al. 2024

Advanced Physics Research

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Abstract3D topological textures have attracted significant attention from researchers due to their distinctive spatial arrangements and intriguing physical properties. However, investigating their topological domain structures at the submicron scale (<1000 nm) proves exceedingly elusive and under‐explored. Here, the size‐dependent behaviors of non‐uniform magnetic domain structures within submicron‐sized FeNi magnetic nanoparticles by micromagnetic simulations are systematically explored. Notably, the existence of magnetic toron‐like structures at the submicron scale and discuss their spatial arrangement and topological properties are identified. Furthermore, critical transition sizes are calculated under various aspect ratios, and the domain structure phase diagram based on nanoparticle size and aspect ratio is constructed. Through visualizations of domain flipping processes and dynamic energy changes, the stable existence of toron‐like magnetic configuration resulting from the competition among demagnetization energy, magnetic anisotropy energy, and magnetic exchange energy are unveiled. Finally, the utilization of core‐shell structures to achieve the stable existence of 3D topological textures are proposed. This work provides important theoretical insights for understanding and designing multi‐domain structures of FeNi nanoparticles at the submicron scale, as well as for constructing topological textures.

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3D Topological Toron‐Like Domains in Magnetic Nanoparticles: A Micromagnetic Simulation

Dong,

Liang,

Guo

et al. 2024

Advanced Physics Research

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Enhanced energy storage performance in BaZr_xTi_1–xO₃ lead-free ferroelectrics near phase transitions

Vu,

Dang,

Dinh

et al. 2024

J. Phys.: Condens. Matter

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The present study explores the energy storage properties of BaZrxTi1−xO3 through phase-field modeling, focusing on the impact of composition and temperature on energy storage performance. The obtained results reveal a variety of polarization phases and configurations based on Zr compositions and temperatures. A detailed phase diagram for temperature-composition of BaZrxTi1−xO3 is established, closely aligning with experimental measurements. Variations in Zr content and temperature have a significant impact on the polarization-electric field response, influencing the energy storage properties. Calculations of energy storage properties are derived from the polarization-electric field response. In addition, a thorough diagram is developed to illustrate the discharge energy density of BaZrxTi1−xO3 as a function of temperature and composition. Notably, high discharge energy density is achievable near the Curie temperature, corresponding to the transition from ferroelectric to paraelectric phase. Furthermore, the present study emphasizes the importance of the disparity between maximum and remanent polarization, as well as the electric field-dependent effective permittivity, in determining the discharge energy density.

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Polar toron structure in ferroelectric core-shell nanoparticles

Cited by 2 publications

References 35 publications

3D Topological Toron‐Like Domains in Magnetic Nanoparticles: A Micromagnetic Simulation

3D Topological Toron‐Like Domains in Magnetic Nanoparticles: A Micromagnetic Simulation

Enhanced energy storage performance in BaZr_xTi_1–xO₃ lead-free ferroelectrics near phase transitions

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Polar toron structure in ferroelectric core-shell nanoparticles

Cited by 2 publications

References 35 publications

3D Topological Toron‐Like Domains in Magnetic Nanoparticles: A Micromagnetic Simulation

3D Topological Toron‐Like Domains in Magnetic Nanoparticles: A Micromagnetic Simulation

Enhanced energy storage performance in BaZrxTi1–xO3 lead-free ferroelectrics near phase transitions

Contact Info

Product

Resources

About

Enhanced energy storage performance in BaZr_xTi_1–xO₃ lead-free ferroelectrics near phase transitions