刚玉型氧化物中的磁介质效应Co4NbTaO9

IF 2.5 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Magnetism and Magnetic Materials Pub Date : 2024-10-02 DOI:10.1016/j.jmmm.2024.172571

Asish K. Kundu , Md. Motin Seikh , Bernard Raveau

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引用次数: 0

摘要

我们深入研究了 Co4NbTaO9 以及同型 Co4Nb2O9、Co4Nb1.5Ta0.5O9 和 Co3NiNb2O9 相的结构、磁性和磁介电特性，它们都是具有三方结构的非共轭反铁磁体。过渡温度随 Ta 的取代而降低，随 Ni 的取代而升高。在没有外磁场的情况下，磁转变温度以下没有发现介电异常。然而，在外加磁场下会出现突出的介电峰值，且峰值大小随磁场强度的增加而增大，这描述了磁介电和磁电现象。我们描述了自旋翻转磁转变导致的磁场诱导介电效应。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Magneto-dielectric effect in corundum-type oxide: Co4NbTaO9

We have thoroughly studied the structure, magnetic and magneto-dielectric properties of Co₄NbTaO₉ along with the isotypic Co₄Nb₂O₉, Co₄Nb_1.5Ta_0.5O₉ and Co₃NiNb₂O₉ phases, which are noncollinear antiferromagnet with trigonal structure. The transition temperature decreases with Ta substitution, whereas it increases with Ni substitution. In the absence of external magnetic fields, no dielectric anomaly is noticed below the magnetic transition temperature. However, prominent dielectric peak appears under external magnetic fields and the peak magnitude increases with increasing field strengths, depicting magneto-dielectric and magnetoelectric phenomena. We describe the magnetic field induced dielectric effect due to the spin-flop magnetic transition.

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来源期刊

Journal of Magnetism and Magnetic Materials 物理-材料科学：综合

CiteScore

5.30

自引率

11.10%

发文量

1149

审稿时长

59 days

期刊介绍： The Journal of Magnetism and Magnetic Materials provides an important forum for the disclosure and discussion of original contributions covering the whole spectrum of topics, from basic magnetism to the technology and applications of magnetic materials. The journal encourages greater interaction between the basic and applied sub-disciplines of magnetism with comprehensive review articles, in addition to full-length contributions. In addition, other categories of contributions are welcome, including Critical Focused issues, Current Perspectives and Outreach to the General Public. Main Categories: Full-length articles: Technically original research documents that report results of value to the communities that comprise the journal audience. The link between chemical, structural and microstructural properties on the one hand and magnetic properties on the other hand are encouraged. In addition to general topics covering all areas of magnetism and magnetic materials, the full-length articles also include three sub-sections, focusing on Nanomagnetism, Spintronics and Applications. The sub-section on Nanomagnetism contains articles on magnetic nanoparticles, nanowires, thin films, 2D materials and other nanoscale magnetic materials and their applications. The sub-section on Spintronics contains articles on magnetoresistance, magnetoimpedance, magneto-optical phenomena, Micro-Electro-Mechanical Systems (MEMS), and other topics related to spin current control and magneto-transport phenomena. The sub-section on Applications display papers that focus on applications of magnetic materials. The applications need to show a connection to magnetism. Review articles: Review articles organize, clarify, and summarize existing major works in the areas covered by the Journal and provide comprehensive citations to the full spectrum of relevant literature.