Improved magnetic properties of sol–gel prepared CoFe1.95Sm0.05O4 and CoFe1.95Gd0.05O4 ferrites

IF 3.2 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS

Journal of Sol-Gel Science and Technology Pub Date : 2025-04-28 DOI:10.1007/s10971-025-06756-y

M. Siddeshwar, Kanchana Latha Chittury, V. Rama Devi, Puli Nageswar Rao, T. Ramesh, P. Sowjanya, Nehru Boda, N. Pavan Kumar

{"title":"Improved magnetic properties of sol–gel prepared CoFe1.95Sm0.05O4 and CoFe1.95Gd0.05O4 ferrites","authors":"M. Siddeshwar, Kanchana Latha Chittury, V. Rama Devi, Puli Nageswar Rao, T. Ramesh, P. Sowjanya, Nehru Boda, N. Pavan Kumar","doi":"10.1007/s10971-025-06756-y","DOIUrl":null,"url":null,"abstract":"<div>Two distinct Rare Earth (RE) element doped cobalt nano ferrite compounds CoFe1.95Sm0.05O4 and CoFe1.95Gd0.05O4 were synthesized using the sol–gel method without using an organic gelation agent and investigated their optical, structural, and magnetic properties. Rietveld’s study of XRD noted the formation of a single-phase cubic Fd-3m spinel structure. SEM EDS confirms the presence of all elements as per the composition. CoFe1.95Sm0.05O4 shows lower band gap value than CoFe1.95Gd0.05O4 which were measured from UV-Visible spectra. FTIR spectra confirmed the presence of characteristic spinel vibrations. Magnetic parameters were measured by using M vs H and M vs 1/H2 spectra from vibrating sample magnetometer (VSM measurements). The Ms (saturation magnetization) values were 51.51 emu/g and 47.86 emu/g for CoFe1.95Sm0.05O4 and CoFe1.95Gd0.05O4 respectively. The higher coercivity values i.e., 2062 Oe for CoFe1.95Sm0.05O4 and 2697 Oe for CoFe1.95Gd0.05O4 were observed compared to literature. The prepared RE-doped cobalt nano ferrite materials offer promising applications for functional devices and enhanced magnetic properties of the composites.<h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"114 3","pages":"1051 - 1061"},"PeriodicalIF":3.2000,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Sol-Gel Science and Technology","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s10971-025-06756-y","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}

引用次数: 0

Abstract

Two distinct Rare Earth (RE) element doped cobalt nano ferrite compounds CoFe_1.95Sm_0.05O₄ and CoFe_1.95Gd_0.05O₄ were synthesized using the sol–gel method without using an organic gelation agent and investigated their optical, structural, and magnetic properties. Rietveld’s study of XRD noted the formation of a single-phase cubic Fd-3m spinel structure. SEM EDS confirms the presence of all elements as per the composition. CoFe_1.95Sm_0.05O₄ shows lower band gap value than CoFe_1.95Gd_0.05O₄ which were measured from UV-Visible spectra. FTIR spectra confirmed the presence of characteristic spinel vibrations. Magnetic parameters were measured by using M vs H and M vs 1/H² spectra from vibrating sample magnetometer (VSM measurements). The M_s (saturation magnetization) values were 51.51 emu/g and 47.86 emu/g for CoFe_1.95Sm₀.₀₅O₄ and CoFe_1.95Gd_0.05O₄ respectively. The higher coercivity values i.e., 2062 Oe for CoFe_1.95Sm_0.05O₄ and 2697 Oe for CoFe_1.95Gd_0.05O₄ were observed compared to literature. The prepared RE-doped cobalt nano ferrite materials offer promising applications for functional devices and enhanced magnetic properties of the composites.

Graphical Abstract

查看原文本刊更多论文

溶胶-凝胶法制备的cofe1.95 sm0.050 o4和cofe1.95 gd0.050 o4铁氧体的磁性能得到改善

采用溶胶-凝胶法合成了两种不同的稀土元素掺杂钴纳米铁氧体化合物cofe1.95 sm0.050 o4和cofe1.95 gd0.050 o4，并研究了它们的光学、结构和磁性能。Rietveld的XRD研究注意到形成了单相立方Fd-3m尖晶石结构。SEM - EDS确认了所有元素的存在。CoFe1.95Sm0.05O4的带隙值低于CoFe1.95Gd0.05O4的带隙值。FTIR光谱证实了尖晶石振动特征的存在。利用振动样品磁强计（VSM）的M vs H和M vs 1/H2光谱测量磁性参数。cofe1.95 sm0.050 o4和cofe1.95 gd0.050 o4的饱和磁化Ms分别为51.51 emu/g和47.86 emu/g。与文献相比，cofe1.95 sm0.050 o4的矫顽力值为2062 Oe， cofe1.95 gd0.050 o4的矫顽力值为2697 Oe。制备的稀土掺杂钴纳米铁氧体材料在功能器件和增强复合材料磁性能方面具有很好的应用前景。图形抽象

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 Sol-Gel Science and Technology 工程技术-材料科学：硅酸盐

CiteScore

4.70

自引率

4.00%

发文量

280

审稿时长

2.1 months

期刊介绍： The primary objective of the Journal of Sol-Gel Science and Technology (JSST), the official journal of the International Sol-Gel Society, is to provide an international forum for the dissemination of scientific, technological, and general knowledge about materials processed by chemical nanotechnologies known as the "sol-gel" process. The materials of interest include gels, gel-derived glasses, ceramics in form of nano- and micro-powders, bulk, fibres, thin films and coatings as well as more recent materials such as hybrid organic-inorganic materials and composites. Such materials exhibit a wide range of optical, electronic, magnetic, chemical, environmental, and biomedical properties and functionalities. Methods for producing sol-gel-derived materials and the industrial uses of these materials are also of great interest.