Structural, Magnetic, Dielectric, and Ferroelectric Properties of CoFe2O4-BaTiO3 Nanocomposites

IF 2.2 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

Journal of Electronic Materials Pub Date : 2024-09-14 DOI:10.1007/s11664-024-11419-9

Nidhi Sheoran, Sourabh Sharma, Mukesh Sheoran, Vinod Kumar, Ashok Kumar, O. P. Thakur

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Abstract

Nano-size spinel ferrite CoFe₂O₄ (CFO), ferroelectric BaTiO₃ (BTO), and their nanocomposites BTO@CFO (BTO nanoparticles are added during the synthesis of CFO) and CFO@BTO (CFO nanoparticles are added during the synthesis of BTO) were synthesized using a combination of chemical co-precipitation and sol–gel routes, respectively. The phase formation and crystallinity of the bare CFO and BTO and their nanocomposites were verified via x-ray diffraction (XRD) patterns. High-resolution transmission electron microscopy (HRTEM) revealed the formation of the nanocomposites. Magnetization measurements confirmed the ferromagnetic behavior of all the samples except BTO, in which superposition of a weak ferromagnetic and diamagnetic response occurred due to its nanostructure. Magnetization versus temperature (M–T plot) measurements showed an anomaly near the ferroelectric-to-paraelectric phase transition of BTO. Also, the dielectric constant (ε′) and loss tangent (tanδ) with respect to frequency (10²–10⁶ Hz) and temperature (300–700 K) were examined. The ε′–T curve of the nanocomposites exhibited an anomaly at the same temperature as observed in the M–T plot, indicating the inherent magnetoelectric coupling in the nanocomposites. The energy storage properties of BTO and the nanocomposites were examined via P–E loop analysis and confirmed that the CFO@BTO sample exhibits maximum energy storage efficiency.

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CoFe2O4-BaTiO3 纳米复合材料的结构、磁性、介电和铁电特性

采用化学共沉淀和溶胶-凝胶相结合的方法，分别合成了纳米级尖晶石铁氧体 CoFe2O4（CFO）、铁电性 BaTiO3（BTO）及其纳米复合材料 BTO@CFO（在合成 CFO 时加入 BTO 纳米颗粒）和 CFO@BTO（在合成 BTO 时加入 CFO 纳米颗粒）。通过 X 射线衍射（XRD）图验证了裸 CFO 和 BTO 及其纳米复合材料的相形成和结晶度。高分辨率透射电子显微镜（HRTEM）显示了纳米复合材料的形成。磁化测量证实了所有样品的铁磁行为，但 BTO 除外，由于其纳米结构，出现了弱铁磁和二磁反应的叠加。磁化与温度的关系（M-T 图）测量结果显示，BTO 在铁电相向准电相转变附近出现异常。此外，还研究了介电常数（ε′）和损耗正切（tanδ）与频率（102-106 Hz）和温度（300-700 K）的关系。纳米复合材料的ε′-T 曲线在 M-T 图中观察到的相同温度下出现异常，表明纳米复合材料中存在固有的磁电耦合。通过 P-E 循环分析检验了 BTO 和纳米复合材料的储能特性，证实 CFO@BTO 样品具有最高的储能效率。

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来源期刊

Journal of Electronic Materials 工程技术-材料科学：综合

CiteScore

4.10

自引率

4.80%

发文量

693

审稿时长

3.8 months

期刊介绍： The Journal of Electronic Materials (JEM) reports monthly on the science and technology of electronic materials, while examining new applications for semiconductors, magnetic alloys, dielectrics, nanoscale materials, and photonic materials. The journal welcomes articles on methods for preparing and evaluating the chemical, physical, electronic, and optical properties of these materials. Specific areas of interest are materials for state-of-the-art transistors, nanotechnology, electronic packaging, detectors, emitters, metallization, superconductivity, and energy applications. Review papers on current topics enable individuals in the field of electronics to keep abreast of activities in areas peripheral to their own. JEM also selects papers from conferences such as the Electronic Materials Conference, the U.S. Workshop on the Physics and Chemistry of II-VI Materials, and the International Conference on Thermoelectrics. It benefits both specialists and non-specialists in the electronic materials field. A journal of The Minerals, Metals & Materials Society.