Tunable magnetic and structural properties of CrxCo1-xFe2O4 nanoferrites

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

Journal of Magnetism and Magnetic Materials Pub Date : 2025-05-14 DOI:10.1016/j.jmmm.2025.173186

Ravikant Beniwal , Anchal , Pooja Yadav , Yashpal Choudhary , Avinash Rundla , Kedar Singh , P.A. Alvi , B.L. Choudhary

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引用次数: 0

Abstract

The nanocrystalline Cr_xCo_1-xFe₂O₄, (where x = 0.1, 0.3, 0.5, and 0.7) ferrite samples were synthesized and characterized to investigate their structural and magnetic properties. Field Emission Scanning Electron Microscopy (FESEM) confirmed nanoscale morphology with nearly spherical particles, with grain size decreasing as Cr content increased. X-ray diffraction (XRD) analysis verified the incorporation of Cr³⁺ ions into the lattice, resulting in structural modifications. Magnetic measurements revealed a systematic decrease in coercivity, remanence, and saturation magnetization with increasing temperature and Cr content, indicating a transition from ferromagnetic to superparamagnetic behavior at 300 K. Zero-field-cooled (ZFC) and field-cooled (FC) magnetization curves demonstrated magnetic relaxation effects, while field-dependent magnetization (M−H) data highlighted the role of Cr in reducing net magnetization due to weakened superexchange interactions. Raman spectroscopy confirmed the presence of a spinel structure with distinct vibrational modes, showing evidence of cation redistribution and structural distortions. These findings establish Cr substituted CoFe₂O₄ as a promising material for applications in magnetic storage, spintronics, and biomedical fields, where tunable magnetic and structural properties are essential.

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CrxCo1-xFe2O4纳米铁氧体的可调磁性和结构性能

合成了纳米晶CrxCo1-xFe2O4（其中x = 0.1, 0.3, 0.5和0.7）铁氧体样品，并对其结构和磁性能进行了表征。场发射扫描电子显微镜（FESEM）证实了纳米级的近球形颗粒，随着Cr含量的增加晶粒尺寸减小。x射线衍射（XRD）分析证实了Cr3+离子进入晶格，导致结构改变。磁性测量显示，随着温度和Cr含量的增加，矫顽力、剩磁和饱和磁化强度有系统地降低，表明在300 K时从铁磁性向超顺磁性转变。零场冷却（ZFC）和场冷却（FC）磁化曲线显示出磁弛豫效应，而场相关磁化（M−H）数据强调了Cr在降低净磁化强度方面的作用，这是由于超交换相互作用减弱。拉曼光谱证实了具有不同振动模式的尖晶石结构的存在，显示出阳离子重新分布和结构扭曲的证据。这些发现表明，Cr取代CoFe2O4是一种很有前途的材料，可用于磁存储、自旋电子学和生物医学领域，在这些领域，可调的磁性和结构特性是必不可少的。

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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.