Effect of cation distribution on structural and mechanical properties of Y 3+ substituted Co-Zn spinel ferrites nanoparticles

• Published in: Journal of physics. Conference series 2023-02, Vol.2426 (1), p.12030
• Main Authors: Nikam, C U, Birajdar, A P, Kadam, S S, Choudhari, S. S., Shinde, V S, Shelke, S B, Kadam, R H, Kale, G H
• Format: Article
• Language: English
• ISSN: 1742-6588; 1742-6596
• DOI: 10.1088/1742-6596/2426/1/012030

Yttrium (Y 3+ ) substituted Co-Zn spinel ferrite nanoparticles with compositional formula Co 0.9 Zn 0.2 Y x Fe 1.9-x O 4 (x = 0.0, 0.015, 0.030, 0.045, 0.06) were synthesized by using sol-gel auto-ignition route. The structural and mechanical properties of Co-Zn ferrites were tailored by the replacement of Fe 3+ ions by Y 3+ ions. Rietveld refined X-ray diffraction patterns of all the samples confirm the cubic spinel structure. Lattice parameter increases with the substitution of Y 3+ ions which may be due to the difference in ionic radii. The crystallite size obtained from XRD analysis is found in the nanometer range of 16.8 – 24.7 nm. Distribution of cations over tetrahedral – A and octahedral – B sites have been studied by using X-ray diffraction data and it is found that Y 3+ ions prefers the octahedral – B site. Infrared spectra of all the samples were recorded in the wave number range of 300 cm −1 to 800 cm −1 which shows splitting of the two fundamental absorption bands. Two absorption bands (ν 1 and ν 2 ) observed in the range 380 – 610 cm −1 are belongs to tetrahedral – A and octahedral – B interstitial sites. The force constants (K O and K t ) and corresponding elastic parameters were determined by using IR data. The stiffness constant (C 11 ), Young’s modulus (E), rigidity modulus (G), bulk modulus (B) and Debye temperature (θ D ) were found increases with the addition of Y 3+ ions.