Green synthesis of chromium substituted calcium hexaferrite nanoparticles for high-frequency applications

IF 2.6 4区 物理与天体物理 Q2 PHYSICS, APPLIED International Journal of Modern Physics B Pub Date : 2023-11-03 DOI:10.1142/s0217979224503818
R. Umashankara Raja, R. Munirathnam, Y. S. Vidya, H. C. Manjunatha, K. N. Sridhar, K. M. Rajashekara, S. Manjunatha, L. Seenappa
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Abstract

For the first of its kind, Cr[Formula: see text]-substituted calcium hexaferrite (CaCr x Fe[Formula: see text]O[Formula: see text] ([Formula: see text], 3, 5 and 7)) nanoparticles (NPs) were synthesized via a facile, economical, eco-friendly lemon juice extract mediated green solution combustion method. The samples were calcined followed by characterization. The Bragg reflections confirm the formation of a single phase M-type hexaferrite crystal structure. No other impurity or mixed phases are observed even after the substitution of Cr[Formula: see text] to the host matrix. Meanwhile, the crystallite size decreases from 29.44 to 19.92[Formula: see text]nm with an increase in the substitution of Cr[Formula: see text] ions. The surface morphological analysis shows the presence of agglomerated irregularly shaped NPs. The direct energy band gap estimated using Wood and Tauc’s relation depicts the decrease in energy band gap from 2.98 to 2.74[Formula: see text]eV with an increase in the substitution of Cr[Formula: see text] ions. These Cr[Formula: see text]-substituted calcium hexaferrite NPs were predicted to be useful in high-frequency applications based on structural, dielectric, and magnetic studies.
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绿色合成铬取代六铁酸钙纳米颗粒用于高频应用
采用简便、经济、环保的柠檬汁提取物介导的绿色溶液燃烧法,首次合成了Cr[公式:见文]取代六铁酸钙(CaCr × Fe[公式:见文]O[公式:见文]([公式:见文],3,5和7))纳米颗粒(NPs)。将样品煅烧后进行表征。Bragg反射证实了单相m型六铁体晶体结构的形成。即使将Cr[公式:见文]替换为基体后,也未观察到其他杂质或混合相。同时,随着Cr[公式:见文]离子取代量的增加,晶体尺寸从29.44 nm减小到19.92 nm。表面形态分析显示存在不规则形状的聚集NPs。利用Wood和Tauc关系估计的直接能带隙描述了随着Cr[公式:见文本]离子取代量的增加,能带隙从2.98降低到2.74[公式:见文本]。基于结构、电介质和磁性研究,这些Cr[公式:见文本]取代的六铁铁氧体钙NPs被预测在高频应用中很有用。
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来源期刊
International Journal of Modern Physics B
International Journal of Modern Physics B 物理-物理:凝聚态物理
CiteScore
3.70
自引率
11.80%
发文量
417
审稿时长
3.1 months
期刊介绍: Launched in 1987, the International Journal of Modern Physics B covers the most important aspects and the latest developments in Condensed Matter Physics, Statistical Physics, as well as Atomic, Molecular and Optical Physics. A strong emphasis is placed on topics of current interest, such as cold atoms and molecules, new topological materials and phases, and novel low dimensional materials. One unique feature of this journal is its review section which contains articles with permanent research value besides the state-of-the-art research work in the relevant subject areas.
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