Influence of trivalent (Gd3+, Cr3+) ion substitution on the structural and magnetic properties of Ni0.4Zn0.6Cr0.5GdxFe1.5-xO4 ferrite nanoparticles

Anupama, . and Rudraswamy, B. and Dhananjaya, N. (2017) Influence of trivalent (Gd3+, Cr3+) ion substitution on the structural and magnetic properties of Ni0.4Zn0.6Cr0.5GdxFe1.5-xO4 ferrite nanoparticles. International Journal of Nanotechnology, 14 (9-11). pp. 867-874. ISSN 14757435

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We report on the influence of Gd3+ and Cr3+ doped nanocrystalline ferrite materials with a general formula of Ni0.4Zn0.6Cr0.5GdxFe1.5-xO4 (where x = 0.00, 0.02, 0.04, 0.06) have been synthesised by solution combustion method using oxylyl dehydrazide (ODH) as a fuel. The structural and magnetic properties of the samples were characterised by X-ray diffractometer (XRD), Fourier transform infrared (FTIR) spectroscopy and vibrating sample magnetometer (VSM). The XRD analysis of the as synthesised sample reveals single phase with spinel cubic structure (Fd-3m space group) and the average crystalline sizes of the nanoparticle were estimated using Debye Scherrer's formula and found to be 19-34 nm. The FTIR results show the functional groups of Ni-Zn ferrite the two main spectroscopic bands corresponding to lattice vibrations were observed in the wavelength range from 300 cm-1 to 1000 cm-1. The absorption bands at 577 cm-1 and 380 cm-1 were assigned to tetrahedral (A) and octahedral (B) groups respectively in all the samples. Also IR spectrum shows that Gd3+ occupies the octahedral B-sites. Magnetic parameters such as saturation magnetisation (Ms), remanence magnetisation (Mr) and coercivity (Hc) were measured from the hysteresis loop. The saturation magnetisation increases for x = 0.00, 0.02 and decreases. This kind of ferrites could be used to prepare magnetic fluids and also used for high frequency applications.

Item Type: Article
Additional Information: cited By 0
Uncontrolled Keywords: Ferrite; Fourier transform infrared spectroscopy; Lattice vibrations; Magnetic materials; Magnetic properties; Magnetism; Magnetization; Nanocrystalline materials; Nanocrystals; Nanoparticles; Nickel; Saturation magnetization; X ray diffraction; Zinc, Average crystalline size; Gd doped; High-frequency applications; Nanocrystalline ferrites; Ni-Zn ferrites; Solution combustion method; Structural and magnetic properties; Vibrating sample magnetometer, Nanomagnetics
Subjects: Faculty of Science > Pure Sciences > Physics
Divisions: Jnana Bharathi / Central College Campus > Department of Physics
Depositing User: Dr. M Anjanappa
Date Deposited: 14 Jun 2018 11:07
Last Modified: 14 Jun 2018 11:07

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