{"title":"溶胶-凝胶法制备钡m型六铁体：高钴掺杂对BaFe12O19六铁体结构、光学、表面和磁性的影响","authors":"Himanshi, Rohit Jasrotia, Basant Lal, Natrayan Lakshmaiya, Jahangeer Ahmed, Ashwani Sood, Suman, Abhishek Kandwal, Saad M. Alshehri","doi":"10.1007/s10971-025-06861-y","DOIUrl":null,"url":null,"abstract":"<div><p>In this research work, cobalt-doped barium hexaferrites of composition, Ba<sub>1-x</sub>Co<sub>x</sub>Fe<sub>12</sub>O<sub>19</sub> (<i>x</i> = 0.2, 0.4, and 0.6) are fabricated via the sol-gel auto-combustion (SGC) method to investigate the morphological, structural, optical, surface, and magnetic traits. This research is performed to analyze the effect of the high cobalt doping at the lattice sites of barium cations. The magneto-plumbite crystal structure with a small trace of α-Fe<sub>2</sub>O<sub>3</sub> is confirmed via the XRD analysis. An increase in the values of crystallite size is observed with the increasing cobalt doping. FESEM show the formation of well-defined surface morphology with the aggregated grains. The mesoporous structure of cobalt doped barium hexaferrites are confirmed through the BET analysis. The existence of nine Raman active vibrational modes shows the formation of hexagonal structure for the prepared barium hexaferrites. The oxidation states of every element present in the synthesised specimens are confirmed by the XPS analysis. At room temperature, with the increasing cobalt doping, the values of coercivity (H<sub>c</sub>) and saturation magnetisation (M<sub>s</sub>) decreases from 2368 to 1542 Oe and 43.11 to 25.12 emu/g. Therefore, in this research work, the admirable values of M<sub>s</sub>, H<sub>c</sub>, and surface area are making these hexaferrites as the useful candidate for the recording media and environmental applications.</p><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":"115 3","pages":"1497 - 1509"},"PeriodicalIF":3.2000,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Sol-gel fabricated barium M-type hexaferrites: Effect of high cobalt doping on the structural, optical, surface, and magnetic traits of BaFe12O19 hexaferrites\",\"authors\":\"Himanshi, Rohit Jasrotia, Basant Lal, Natrayan Lakshmaiya, Jahangeer Ahmed, Ashwani Sood, Suman, Abhishek Kandwal, Saad M. Alshehri\",\"doi\":\"10.1007/s10971-025-06861-y\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>In this research work, cobalt-doped barium hexaferrites of composition, Ba<sub>1-x</sub>Co<sub>x</sub>Fe<sub>12</sub>O<sub>19</sub> (<i>x</i> = 0.2, 0.4, and 0.6) are fabricated via the sol-gel auto-combustion (SGC) method to investigate the morphological, structural, optical, surface, and magnetic traits. This research is performed to analyze the effect of the high cobalt doping at the lattice sites of barium cations. The magneto-plumbite crystal structure with a small trace of α-Fe<sub>2</sub>O<sub>3</sub> is confirmed via the XRD analysis. An increase in the values of crystallite size is observed with the increasing cobalt doping. FESEM show the formation of well-defined surface morphology with the aggregated grains. The mesoporous structure of cobalt doped barium hexaferrites are confirmed through the BET analysis. The existence of nine Raman active vibrational modes shows the formation of hexagonal structure for the prepared barium hexaferrites. The oxidation states of every element present in the synthesised specimens are confirmed by the XPS analysis. At room temperature, with the increasing cobalt doping, the values of coercivity (H<sub>c</sub>) and saturation magnetisation (M<sub>s</sub>) decreases from 2368 to 1542 Oe and 43.11 to 25.12 emu/g. Therefore, in this research work, the admirable values of M<sub>s</sub>, H<sub>c</sub>, and surface area are making these hexaferrites as the useful candidate for the recording media and environmental applications.</p><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\":\"115 3\",\"pages\":\"1497 - 1509\"},\"PeriodicalIF\":3.2000,\"publicationDate\":\"2025-07-14\",\"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/s10971-025-06861-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}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Sol-Gel Science and Technology","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s10971-025-06861-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}
Sol-gel fabricated barium M-type hexaferrites: Effect of high cobalt doping on the structural, optical, surface, and magnetic traits of BaFe12O19 hexaferrites
In this research work, cobalt-doped barium hexaferrites of composition, Ba1-xCoxFe12O19 (x = 0.2, 0.4, and 0.6) are fabricated via the sol-gel auto-combustion (SGC) method to investigate the morphological, structural, optical, surface, and magnetic traits. This research is performed to analyze the effect of the high cobalt doping at the lattice sites of barium cations. The magneto-plumbite crystal structure with a small trace of α-Fe2O3 is confirmed via the XRD analysis. An increase in the values of crystallite size is observed with the increasing cobalt doping. FESEM show the formation of well-defined surface morphology with the aggregated grains. The mesoporous structure of cobalt doped barium hexaferrites are confirmed through the BET analysis. The existence of nine Raman active vibrational modes shows the formation of hexagonal structure for the prepared barium hexaferrites. The oxidation states of every element present in the synthesised specimens are confirmed by the XPS analysis. At room temperature, with the increasing cobalt doping, the values of coercivity (Hc) and saturation magnetisation (Ms) decreases from 2368 to 1542 Oe and 43.11 to 25.12 emu/g. Therefore, in this research work, the admirable values of Ms, Hc, and surface area are making these hexaferrites as the useful candidate for the recording media and environmental applications.
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.
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