Magnetic structure and magnetodielectric behavior of the chiral magnet CoTeMoO6

IF 3 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Journal of Magnetism and Magnetic Materials Pub Date : 2025-06-15 Epub Date: 2025-03-21 DOI:10.1016/j.jmmm.2025.172963

Brady Wilson , Ananta Raj Acharya , Eun Sang Choi , Ram Rai , Qiang Zhang , Stuart Calder , Rafael Gonzalez-Hernandez , Jonathan Guerrero Sanchez , Chetan Dhital

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Abstract

We investigate the magnetic structure and magnetodielectric behavior of the chiral magnet CoTeMoO

_{6}

(CTMO) through neutron diffraction, magnetization, and magnetodielectric measurements, complemented by density functional theory (DFT) calculations. Our findings reveal a canted magnetic structure with moments confined to the ab plane, giving rise to weak ferromagnetism under an external magnetic field. Additionally, we observe magnetodielectric coupling that strongly correlates with the magnetic ordering temperature and magnetic structure. These results are discussed in the context of potential mechanisms involving spin-dependent

p

d

hybridization and spin-phonon coupling.

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手性磁体CoTeMoO6的磁性结构和磁介电行为

我们通过中子衍射、磁化和磁介电测量，并辅以密度泛函理论（DFT）计算，研究了手性磁体 CoTeMoO6（CTMO）的磁结构和磁介电行为。我们的研究结果表明，该物质具有一种尖角磁结构，其磁矩局限于 ab 平面，在外部磁场作用下会产生弱铁磁性。此外，我们还观察到与磁有序温度和磁结构密切相关的磁电耦合。这些结果将在涉及自旋相关 p-d 杂化和自旋-声子耦合的潜在机制背景下进行讨论。

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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.