Enhanced magnetic properties of Gd3+ doped Co-Mn ferrite nanoparticles for high-density data storage applications

IF 5.6 2区 材料科学 Q1 MATERIALS SCIENCE, CERAMICS
Sweta Singh, Vineet Sharma
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引用次数: 0

Abstract

Magnetic nanoparticles possess distinctive properties from their nanoscale dimensions, tunable magnetic behavior, and ability to exhibit unique interactions at the atomic level. In this study, Gd3+substituted ferrite nanoparticles with the composition Co0.5Mn0.5GdxFe2-xO4 (x = 0, 0.005, 0.01, 0.05, and 0.1) have been prepared through the sol-gel technique. The magnetic and structural characteristics of the nanoparticles have been thoroughly investigated using VSM, FTIR, SEM, XRD, UV–visible, and RAMAN spectroscopy. With the incorporation of Gd3+ ions, FTIR, XRD, and RAMAN characterizations corroborate the formation of a face-centered cubic inverse spinel structure with Fd3m space group, accompanied by notable changes in structural parameters. FTIR spectra reveal intrinsic vibrations associated with metal ions at tetrahedral (td) and octahedral (oh) sites. The magnetic characterization demonstrates ferrimagnetic behavior, with an observed increase in the remanence ratio due to enhancement of A-B super-exchange interactions upon Gd3+ substitution. This has been further supported by the proposed cation distribution and calculated Yafet-Kittel angles. Raman spectral analysis corroborates the proposed distribution of cations, while VSM studies reveals the enhanced saturation magnetization (Ms), coercivity (Hc), and magnetic moment (ηβ) on incorporation of Gd3+ ions into Co-Mn nanoferrites, suggesting their potential for data storage applications. This work highlights an appreciable enhancement in vital magnetic characteristics through controlled Gd3+ doping, leading to an optimized distribution of cations in the Co-Mn spinel structure and an efficient control over the crystallite size using sol-gel synthesis method, thereby paving the way for their application in advanced technologies.
Gd3+掺杂Co-Mn铁氧体纳米粒子磁性能增强高密度数据存储应用
磁性纳米颗粒具有纳米级尺寸、可调节的磁性行为和在原子水平上表现出独特相互作用的能力等独特特性。本研究通过溶胶-凝胶技术制备了组成为Co0.5Mn0.5GdxFe2-xO4 (x = 0、0.005、0.01、0.05、0.1)的Gd3+取代铁氧体纳米颗粒。利用VSM, FTIR, SEM, XRD, uv -可见和RAMAN光谱对纳米颗粒的磁性和结构特性进行了深入的研究。随着Gd3+离子的掺入,FTIR、XRD和RAMAN表征证实了具有Fd3m空间群的面心立方反尖晶石结构的形成,同时结构参数发生了显著变化。FTIR光谱揭示了金属离子在四面体(td)和八面体(oh)位点上的固有振动。磁性表征显示出铁磁性行为,由于Gd3+取代后A-B超交换相互作用的增强,剩磁比增加。提出的阳离子分布和计算的Yafet-Kittel角进一步支持了这一点。拉曼光谱分析证实了阳离子的分布,而VSM研究表明,Gd3+离子掺入Co-Mn纳米铁氧体后,饱和磁化强度(Ms)、矫顽力(Hc)和磁矩(ηβ)增强,表明其在数据存储方面的应用潜力。这项工作强调了通过控制Gd3+掺杂可以显著增强重要的磁性,从而优化了Co-Mn尖晶石结构中阳离子的分布,并使用溶胶-凝胶合成方法有效地控制了晶体尺寸,从而为其在先进技术中的应用铺平了道路。
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来源期刊
Ceramics International
Ceramics International 工程技术-材料科学:硅酸盐
CiteScore
9.40
自引率
15.40%
发文量
4558
审稿时长
25 days
期刊介绍: Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.
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