Effects of Ba-substitution on structural and multiferroic characteristics of Z-type hexaferrite ceramics

IF 3.8 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of the American Ceramic Society Pub Date : 2025-08-04 DOI:10.1111/jace.70162

Jun Chao Huang, Shu Ya Wu, Xiao Qiang Liu, Xiang Ming Chen

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引用次数: 0

Abstract

Ba_xSr_3-_xCo₂Fe₂₄O₄₁ (x = 0.0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0) ceramics were synthesized via a standard solid-state reaction process to investigate the effects of Ba-substitution on their structural, ferromagnetic, ferroelectric, and magnetodielectric characteristics. Ba-substitution effectively stabilized the Z-type phase, mitigated Sr segregation, and enhanced both grain growth and saturation magnetization (Ms). With increasing x, the Fe-O-Fe bond angles at the junction of the magnetic blocks decreased, leading to reduced magnetic frustration and decreased stability of the transverse conical magnetic structure. For x ≤ 2.0, a saturated ferroelectric hysteresis loop was observed at 100 K. Notably, the study revealed a complex relationship between the magnetodielectric effect and the substitution level, with optimal coupling coefficients observed at x = 0.5. The results also suggested that the magnetoelectric effect in Z-type hexaferrites might arise from a synergistic interplay between inverse Dzyaloshinskii–Moriya interactions and p-d hybridization mechanisms.

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ba取代对z型六铁体陶瓷结构和多铁性的影响

采用标准固相反应工艺合成了BaxSr3-xCo2Fe24O41 （x = 0.0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0）陶瓷，研究了ba取代对其结构、铁磁、铁电和磁介电特性的影响。ba取代有效地稳定了z型相，减轻了Sr偏析，提高了晶粒生长和饱和磁化强度（Ms）。随着x的增大，磁块连接处Fe-O-Fe键角减小，导致磁阻减小，降低了横向锥形磁结构的稳定性。当x≤2.0时，在100 K时观察到饱和铁电磁滞回线。值得注意的是，该研究揭示了磁介电效应与取代水平之间的复杂关系，在x = 0.5时观察到最佳耦合系数。结果还表明，z型六铁体中的磁电效应可能是由逆Dzyaloshinskii-Moriya相互作用和p-d杂化机制之间的协同作用引起的。

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来源期刊

Journal of the American Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

7.50

自引率

7.70%

发文量

590

审稿时长

2.1 months

期刊介绍： The Journal of the American Ceramic Society contains records of original research that provide insight into or describe the science of ceramic and glass materials and composites based on ceramics and glasses. These papers include reports on discovery, characterization, and analysis of new inorganic, non-metallic materials; synthesis methods; phase relationships; processing approaches; microstructure-property relationships; and functionalities. Of great interest are works that support understanding founded on fundamental principles using experimental, theoretical, or computational methods or combinations of those approaches. All the published papers must be of enduring value and relevant to the science of ceramics and glasses or composites based on those materials. Papers on fundamental ceramic and glass science are welcome including those in the following areas: Enabling materials for grand challenges[...] Materials design, selection, synthesis and processing methods[...] Characterization of compositions, structures, defects, and properties along with new methods [...] Mechanisms, Theory, Modeling, and Simulation[...] JACerS accepts submissions of full-length Articles reporting original research, in-depth Feature Articles, Reviews of the state-of-the-art with compelling analysis, and Rapid Communications which are short papers with sufficient novelty or impact to justify swift publication.