On the role of cationic distribution in determining magnetic properties of Zn0.7-xNixMg0.2Cu0.1Fe2O4 nano ferrite

• Published in: Materials research bulletin Vol. 91; pp. 14 - 21
• Main Authors: Satalkar, M., Kane, S.N., Kumaresavanji, M., Araujo, J.P.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.07.2017
• Subjects: A. Ceramics; A. Magnetic materials; A. Nanostructures; B. Chemical synthesis; C. X-ray diffraction; B. Chemical synthesis; A. Ceramics; A. Magnetic materials; A. Nanostructures; C. X-ray diffraction
• ISSN: 0025-5408; 1873-4227
• DOI: 10.1016/j.materresbull.2017.03.021

[Display omitted] •Ni addition decreases lattice parameter and increases x-ray density.•Ni addition does not affect distribution of Mg2+ ions on A, B site.•SEM images show formation of pores with different pore sizes.•Increase of coercivity with Ni content is observed.•With Ni doping θB−B3, θB−B4, Ms and Néel magnetic moment shows same trend. We report Ni addition induced changes in cationic distribution and its role in determining magnetic properties of Zn0.7-xNixMg0.2Cu0.1Fe2O4 (x=0.0–0.7) nano ferrite synthesized by sol-gel auto-combustion method. X-ray diffraction demonstrates presence of cubic spinel phase, with crystallite size between 32.1–43.0nm. Scanning electron microscope (SEM) images reveal modification of pore sizes. Saturation magnetization (Ms): 43.2–69.9Am2/kg and Néel magnetic moment (nBN):1.74–2.86μB increases up to x=0.42, but at higher values of Ni content (0.42<x≤0.70) Ms and nBN decreases, accredited to migration of Fe3+ ions from A to B site or vice versa. With increasing Ni content, coercivity increases and range between 16.3–131.1Oe. Zero values of Yafet-Kittel angle (αY-K) suggest presence of Néel-type magnetic ordering in Zn0.7-xNixMg0.2Cu0.1Fe2O4. Similar variation of bond angles (θB−B3, θB−B4), Ms, nBN with Ni establishes the role of cationic distribution in determining magnetic properties.