Microwave combustion synthesis of zinc substituted nanocrystalline spinel cobalt ferrite: Structural and magnetic studies

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• 作者：M. Sundararajan^a ; L. John Kennedy^a ; ^{jklsac14@yahoo.co.in" class="auth_mail" title="E-mail the corresponding author} ; Udaya Aruldoss^b ; Sk. Khadeer Pasha^c ; J. Judith Vijaya^d ; Steve Dunn^e
• 关键词：Ferrite nanoparticles ; Microwave processing ; Optical property ; Stretching frequencies ; Magnetic property
• 刊名：Materials Science in Semiconductor Processing
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：40
• 期：Complete
• 页码：1-10
• 全文大小：2391 K

文摘

Zinc doped cobalt ferrite spinel nanoparticles were prepared by the microwave combustion method. All the samples were characterized by using X-ray diffraction technique (XRD), Scanning Electron Microscopy, energy dispersive X-ray analysis, UV–visible diffuse reflectance spectroscopy, Fourier transformed infrared (FT-IR) spectroscopy and vibrating sample magnetometry. The XRD patterns confirmed the formation of single phase CoFe₂O₄ inverse spinel structure without impurities. The lattice parameter increased from 8.380 to 8.396 Å with increasing Zn²⁺ fraction. The average crystallite sizes obtained by a Scherrer method varied between 46.22 nm and 30.79 nm. The estimated band gap energy values increases with an increasing zinc fraction (1.88–2.10 eV). The elemental composition of Zn, Co, and Fe was qualitatively obtained from energy dispersive X-ray (EDX) analysis.