Magnetic response of environmentally friendly prepared La3+ doped Li-Cu spinel ferrites

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

Journal of Magnetism and Magnetic Materials Pub Date : 2025-04-09 DOI:10.1016/j.jmmm.2025.173056

A.U. Rahman , A. Alhadhrami , Mohamed M. Ibrahim , Gaber A.M. Mersal

{"title":"Magnetic response of environmentally friendly prepared La3+ doped Li-Cu spinel ferrites","authors":"A.U. Rahman , A. Alhadhrami , Mohamed M. Ibrahim , Gaber A.M. Mersal","doi":"10.1016/j.jmmm.2025.173056","DOIUrl":null,"url":null,"abstract":"<div><div>In this study, the Li0.1Cu0.5Fe2.3–yLayO4 (y = 0.0, 0.1, 0.2, 0.3, 0.4) spinel ferrites (SFs) were synthesized via self-ignition route, and their structural, morphological, compositional and magnetic properties were systematically analyzed. X-ray diffraction (XRD) analysis revealed a slight shift in the (311) diffraction peak position with increasing La3+ concentration, indicating lattice distortion. The crystallite size (D) decreased from 29.1 nm to 17.3 nm with doping, while lattice constant (a) and unit cell volume (V) exhibited a decreasing trend, confirming structural modifications due to La3+ addition in Li-Cu spinel lattice. Moreover, the particle size was also decreased from 42 nm to 22 nm with the substitution of La3+. Magnetic response demonstrated a significant reduction in saturation magnetization (MS), from 60 emu/g to 23 emu/g, and coercivity (HC), from 1331 Oe to 639 Oe, suggesting weakened magnetic interactions. The squareness ratio (SQ) increased, while the magnetocrystalline anisotropy constant (K) decreased, indicating enhanced magnetic softness. Furthermore, the microwave operating frequency (ωm) was also reduced with La3+ doping, highlighting changes in dynamic magnetic behavior. These findings suggest that La3+ doping effectively tailors the structural and magnetic properties of Li-Cu SFs, making them potential candidates for tunable magnetic applications including recording media, memory devices, and transformer core applications.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"624 ","pages":"Article 173056"},"PeriodicalIF":2.5000,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Magnetism and Magnetic Materials","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0304885325002884","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

In this study, the Li_0.1Cu_0.5Fe_2.3–yLa_yO₄ (y = 0.0, 0.1, 0.2, 0.3, 0.4) spinel ferrites (SFs) were synthesized via self-ignition route, and their structural, morphological, compositional and magnetic properties were systematically analyzed. X-ray diffraction (XRD) analysis revealed a slight shift in the (311) diffraction peak position with increasing La³⁺ concentration, indicating lattice distortion. The crystallite size (D) decreased from 29.1 nm to 17.3 nm with doping, while lattice constant (a) and unit cell volume (V) exhibited a decreasing trend, confirming structural modifications due to La³⁺ addition in Li-Cu spinel lattice. Moreover, the particle size was also decreased from 42 nm to 22 nm with the substitution of La³⁺. Magnetic response demonstrated a significant reduction in saturation magnetization (M_S), from 60 emu/g to 23 emu/g, and coercivity (H_C), from 1331 Oe to 639 Oe, suggesting weakened magnetic interactions. The squareness ratio (SQ) increased, while the magnetocrystalline anisotropy constant (K) decreased, indicating enhanced magnetic softness. Furthermore, the microwave operating frequency (ω_m) was also reduced with La³⁺ doping, highlighting changes in dynamic magnetic behavior. These findings suggest that La³⁺ doping effectively tailors the structural and magnetic properties of Li-Cu SFs, making them potential candidates for tunable magnetic applications including recording media, memory devices, and transformer core applications.

Abstract Image

查看原文本刊更多论文

环境友好型制备La3+掺杂Li-Cu尖晶石铁氧体的磁响应

本研究采用自燃法合成了Li0.1Cu0.5Fe2.3-yLayO4 （y = 0.0, 0.1, 0.2, 0.3, 0.4）尖晶石铁氧体（SFs），并对其结构、形貌、成分和磁性能进行了系统分析。x射线衍射（XRD）分析表明，随着La3+浓度的增加，（311）衍射峰的位置发生了轻微的移动，表明晶格畸变。晶体尺寸D由29.1 nm减小到17.3 nm，晶格常数a和晶胞体积V呈减小趋势，证实了Li-Cu尖晶石晶格中La3+的加入导致了结构改变。La3+的加入使其粒径由原来的42 nm减小到22 nm。磁响应表明，饱和磁化强度（MS）显著降低，从60 emu/g降至23 emu/g，矫顽力（HC）从1331 Oe降至639 Oe，表明磁性相互作用减弱。方形比（SQ）增大，磁晶各向异性常数(K)减小，表明磁性柔软性增强。此外，La3+的掺入也降低了微波工作频率（ωm），表明其动态磁行为发生了变化。这些发现表明，La3+掺杂有效地调整了Li-Cu SFs的结构和磁性，使其成为可调谐磁性应用的潜在候选材料，包括记录介质，存储器件和变压器铁芯应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

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.