A comprehensive study of RE ions Ho doped Ni-Zn nanoferrites synthesized by sol–gel auto-combustion techniques

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

Journal of Magnetism and Magnetic Materials Pub Date : 2025-04-07 DOI:10.1016/j.jmmm.2025.173042

N. Jahan , M.N.I. Khan , M.A. Ali , M.M. Hossain , M.S. Aktar , M.R. Hasan , Md. Akhtaruzzaman , M.M. Uddin

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引用次数: 0

Abstract

High resistivity along with excellent magnetic properties are essential for the use of Ni-Zn nanoferrites in high-frequency applications. The addition of rare-earth (RE) ions Ho³⁺ to Ni-Zn ferrites has resulted in structural distortion and changes in electrical and magnetic properties. In this regards, polycrystalline Ho-substituted Ni_0.5Zn_0.5Ho_xFe_2-_xO₄ (0 ≤ x ≤ 0.20 in the step of 0.04) were synthesized by the sol–gel approach. The samples were examined using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and Fourier transform infrared spectroscopy (FTIR). The Physical Properties Measuring System (PPMS) was utilized to test magnetic properties. The samples’ purity and single-phase was verified by XRD, FESEM, and EDS. While the lattice constant, porosity, and specific surface area increased as the Ho³⁺ ion concentration rose, the bulk density and particle size decreased. Both the average grain size (52–17 nm) and crystallite size decreases with increasing Ho³⁺. DC resistivity of ferrites made by the conventional method was at least four orders of magnitude higher, at order 10¹⁰ Ω-cm. The extremely small grain size causing this discrepancy is properly described by the Maxwell-Wagner hopping conduction model. Applying the Cole-Cole plot, we have elucidated function of grain and grain boundary resistance. Ferrites may be used in high-frequency eddy current loss mitigation devices because of their high resistivity. The findings of this investigation point to the materials’ possible use in a high-frequency magnetic device.

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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.