Structural, Dielectric, Magnetic, and Magnetoelectric Properties of Lead-Free BCZT– CZFO Composite Ceramics

IF 1.8 4区物理与天体物理 Q3 PHYSICS, APPLIED

Journal of Superconductivity and Novel Magnetism Pub Date : 2026-07-04 DOI:10.1007/s10948-026-07212-w

Dnyaneshwar N. Mandve, Namdeo N. Waghule

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Abstract

Lead-free multiferroic composites comprising Ba₀.₉Ca₀.₁Zr₀.₂Ti₀.₈O₃ (BCZT), Co₀.₈Zn₀.₂Fe₂O₄ (CZFO), and their composites 0.75BCZT–0.25CZFO and 0.65BCZT–0.35CZFO were synthesized using a conventional solid-state ceramic route. X-ray diffraction confirmed the coexistence of phase-pure perovskite BCZT and spinel CZFO structures without secondary phases. Electrical resistivity measurements revealed semiconducting behaviour with a negative temperature coefficient of resistance. Dielectric studies showed strong low-frequency dispersion and reduced dielectric loss at higher frequencies, consistent with the Maxwell–Wagner interfacial polarization mechanism. Magnetic characterization demonstrated soft ferrimagnetic behaviour for CZFO-containing samples, while BCZT exhibited negligible magnetization. The present work establishes a systematic correlation between phase composition, dielectric response, electrical transport, magnetic softness, and magnetoelectric coupling. Among the investigated compositions, 0.65BCZT–0.35CZFO exhibited the highest magnetoelectric coefficient due to optimized interfacial strain transfer, highlighting its potential as an environmentally friendly multifunctional material for magnetoelectric applications.

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无铅BCZT - CZFO复合陶瓷的结构、介电、磁性和磁电性能

含Ba₀₉Ca₀₁Zr₀₂Ti₀的无铅多铁复合材料。₈O₃（BCZT）， Co₀。采用传统的固态陶瓷工艺合成了2 Fe₂O₄（CZFO）及其复合材料0.75BCZT-0.25CZFO和0.65BCZT-0.35CZFO。x射线衍射证实了纯钙钛矿BCZT和尖晶石CZFO结构共存，无二次相。电阻率测量显示半导体的行为具有负的电阻温度系数。介质研究表明，该材料低频色散强，高频时介质损耗减小，与麦克斯韦-瓦格纳界面极化机制一致。磁性表征表明含有czfo的样品具有软铁磁性行为，而BCZT的磁化可以忽略不计。本工作建立了相组成、介电响应、电输运、磁柔软度和磁电耦合之间的系统关联。在所研究的组合物中，0.65BCZT-0.35CZFO由于优化了界面应变传递，具有最高的磁电系数，突出了其作为环境友好型多功能磁电材料的潜力。

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来源期刊

Journal of Superconductivity and Novel Magnetism 物理-物理：凝聚态物理

CiteScore

3.70

自引率

11.10%

发文量

342

审稿时长

3.5 months

期刊介绍： The Journal of Superconductivity and Novel Magnetism serves as the international forum for the most current research and ideas in these fields. This highly acclaimed journal publishes peer-reviewed original papers, conference proceedings and invited review articles that examine all aspects of the science and technology of superconductivity, including new materials, new mechanisms, basic and technological properties, new phenomena, and small- and large-scale applications. Novel magnetism, which is expanding rapidly, is also featured in the journal. The journal focuses on such areas as spintronics, magnetic semiconductors, properties of magnetic multilayers, magnetoresistive materials and structures, magnetic oxides, etc. Novel superconducting and magnetic materials are complex compounds, and the journal publishes articles related to all aspects their study, such as sample preparation, spectroscopy and transport properties as well as various applications.