Optimization of structural, optical, dielectric and magnetic properties of Gd3+ substituted Mg-Mn mixed spinel ferrite ceramics

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2024-10-05 DOI:10.1016/j.ceramint.2024.10.011

Varsa Purohit , Babita Ojha , Rakesh Ranjan Sahoo , Dhrubananda Behera , Gorachand Biswal

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Abstract

Manganese magnesium ferrite (Mg_0.5Mn_0.5Fe₂O₄) and Gd doped Mg_0.5Mn_0.5Fe₂O₄ (Mg_0.5Mn_0.5Fe_2-xGd_xO₄ (x = 0.0, 0.1, 0.2, 0.3, 0.4, 0.5) were synthesized using the solid-state method. The structural study was performed using the powder X-ray diffraction (XRD) technique. The XRD plot confirms the presence of a spinel cubic structure for pure MgMn ferrite and the existence of a secondary GdFeO₃ phase in addition to the cubic spinel phase for Gd-doped MgMn ferrite. The average crystallite size estimated from the Williamson-Hall plot decreases from 42.75 nm to 18.97 nm with the increase in Gd content. The microstructural study confirms the clear grains with well-defined grain boundaries. The Fourier Transform Infrared (FTIR) spectra of the samples show the vibrational bands at 3440 cm⁻¹, 1636 cm⁻¹, 1385 cm⁻¹, 1100 cm⁻¹, and 560 cm⁻¹ assigned to tetrahedral and octahedral sites. The improvement in dielectric property has been observed for Gd-doped samples. The saturation magnetization and remnant magnetization decrease from 0.7 to 0.3 emu and 0.035 to 0.0273 emu respectively. The coercivity increases from 31 to 75 Oe with the increase in Gd content. The fabricated spinel ferrites have significant electrical and magnetic properties which may be promising candidates for microwave devices.

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优化 Gd3+ 替代镁锰混合尖晶石铁氧体陶瓷的结构、光学、介电和磁学特性

采用固态法合成了锰镁铁氧体（Mg0.5Mn0.5Fe2O4）和掺杂钆的 Mg0.5Mn0.5Fe2O4（Mg0.5Mn0.5Fe2-xGdxO4 (x = 0.0, 0.1, 0.2, 0.3, 0.4, 0.5)）。利用粉末 X 射线衍射（XRD）技术进行了结构研究。X 射线衍射图证实纯镁锰铁氧体存在尖晶石立方结构，而掺钆镁锰铁氧体除了立方尖晶石相之外还存在次级 GdFeO3 相。随着钆含量的增加，根据威廉森-霍尔曲线图估算出的平均结晶尺寸从 42.75 nm 减小到 18.97 nm。微观结构研究证实，晶粒清晰，晶界分明。样品的傅立叶变换红外光谱（FTIR）显示出 3440 厘米-1、1636 厘米-1、1385 厘米-1、1100 厘米-1 和 560 厘米-1 处的振动带，这些振动带归属于四面体和八面体位点。掺钆样品的介电性能得到了改善。饱和磁化和剩余磁化分别从 0.7 埃姆和 0.035 埃姆降至 0.0273 埃姆。矫顽力随着钆含量的增加从 31 Oe 增至 75 Oe。所制备的尖晶铁氧体具有显著的电学和磁学特性，有望成为微波器件的候选材料。

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来源期刊

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.