新型等摩尔Co3-4x(MnxFexNixCrx)O4 （x = 0.05, 0.10和0.15）纳米粒子的微观结构、电/介电和磁性特征的综合研究

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2025-03-12 DOI:10.1016/j.materresbull.2025.113432

M.A. Almessiere , A. Baykal , Y. Slimani , Sagar E. Shirsath , M.A. Gondal , A. Ali , A. Mihmanlı

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引用次数: 0

摘要

本研究的主要目的是了解Mn、Ni、Fe和Cr多取代对溶胶-凝胶合成的Co3O4纳米颗粒（NPs）的结构、介电和磁性能的影响。结果通过x射线粉末图显示了成功合成的多取代尖晶石氧化物。DXRD在14 ~ 31 nm之间。交流电导率表现出强烈的温度(T)和频率(f)依赖性，反映了以界面极化和极极性传导为主的机制。介电常数受晶界极化和局域载流子的影响，表现出麦克斯韦-瓦格纳型响应。磁测量揭示了铁磁（或亚铁磁）和反铁磁（或顺磁）贡献的共存，铁磁行为的增强归因于非补偿自旋、有限尺寸效应和掺杂离子的高磁矩。随着Fe、Mn、Ni和Cr掺杂离子浓度的增加，材料的矫顽力、磁化强度和剩余磁化强度均增大。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Comprehensive investigation on microstructure, electrical/dielectric and magnetic features of novel equimolar Co3-4x(MnxFexNixCrx)O4 (x = 0.05, 0.10, and 0.15) nanoparticles

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Comprehensive investigation on microstructure, electrical/dielectric and magnetic features of novel equimolar Co3-4x(MnxFexNixCrx)O4 (x = 0.05, 0.10, and 0.15) nanoparticles

The main goal of this study is to understand the influence of Mn, Ni, Fe and Cr multi substitution on structural, dielectric, and magnetic properties of Co₃O₄ nanoparticles (NPs), which have been synthesized via sol-gel synthesis. The results revealed the successfully synthesized multi-substitution spinel oxides through X-ray powder patterns. D_XRD are between 14 and 31 nm. AC conductivity exhibited strong temperature (T) and frequency (f) dependence, reflecting mechanisms dominated by interfacial polarization and polaronic conduction. The dielectric constant demonstrated a Maxwell-Wagner type response, influenced by grain boundary polarization and localized charge carriers. Magnetic measurements revealed the coexistence of ferromagnetic (or ferrimagnetic) and antiferromagnetic (or paramagnetic) contributions, with an enhancement in ferromagnetic behaviour attributed to the non-compensated spins, finite size effects, and higher magnetic moments of dopant ions. The coercivity, magnetization, and remanent magnetization were found to increase with the rise in the concentration of Fe, Mn, Ni, and Cr doping ions.

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.