Universiti Teknologi Malaysia Institutional Repository

Effects of Mg substitution on the structural and magnetic properties of Co0.5Ni0.5-xMgxFe2O4 nanoparticle ferrites

Rosnan, R. M. and Othaman, Zulkafli and Hussin, Rosli and Ati, Ali and Samavati, Alireza and Dabagh, Shadab and Zare, Samad (2016) Effects of Mg substitution on the structural and magnetic properties of Co0.5Ni0.5-xMgxFe2O4 nanoparticle ferrites. Chinese Physics B, 25 (4). pp. 1-8. ISSN 1674-1056

Full text not available from this repository.

Official URL: http://dx.doi.org/10.1088/1674-1056/25/4/047501


In this study, nanocrystalline Co-Ni-Mg ferrite powders with composition Co0.5Ni0.5-xMgxFe2O4 are successfully synthesized by the co-precipitation method. A systematic investigation on the structural, morphological and magnetic properties of un-doped and Mg-doped Co-Ni ferrite nanoparticles is carried out. The prepared samples are characterized using x-ray diffraction (XRD) analysis, Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), and vibrating sample magnetometry (VSM). The XRD analyses of the synthesized samples confirm the formation of single-phase cubic spinel structures with crystallite sizes in a range of similar to 32 nm to similar to 36 nm. The lattice constant increases with increasing Mg content. FESEM images show that the synthesized samples are homogeneous with a uniformly distributed grain. The results of IR spectroscopy analysis indicate the formation of functional groups of spinel ferrite in the co-precipitation process. By increasing Mg2+ substitution, room temperature magnetic measurement shows that maximum magnetization and coercivity increase from similar to 57.35 emu/g to similar to 61.49 emu/g and similar to 603.26 Oe to similar to 684.11 Oe (1 Oe = 79.5775 A.m(-1)), respectively. The higher values of magnetization M-s and M-r suggest that the optimum composition is Co0.5Ni0.4Mg0.1Fe2O4 that can be applied to high-density recording media and microwave devices.

Item Type:Article
Uncontrolled Keywords:spinel ferrite, magnetic properties
Subjects:Q Science > QC Physics
ID Code:69329
Deposited By: Siti Nor Hashidah Zakaria
Deposited On:22 Nov 2017 00:45
Last Modified:22 Nov 2017 00:45

Repository Staff Only: item control page