Document Details

Document Type : Article In Journal 
Document Title :
Effect of Mg substitution on the magnetic properties of NiCuZn ferrite nanoparticles prepared through a novel method using egg white
Effect of Mg substitution on the magnetic properties of NiCuZn ferrite nanoparticles prepared through a novel method using egg white
 
Subject : Chemistry 
Document Language : English 
Abstract : Nanocrystalline Mg-substituted NiCuZn ferrites were successfully synthesized, for the first time, by using metal nitrates and freshly extracted egg white. The thermal decomposition process of the nitrate–egg white precursors was investigated by thermogravimetric (TG) technique. X-ray diffraction (XRD) revealed that, single-phase cubic ferrites with average particle size of 23.9–35.1 nm were directly formed after ignition at 500 °C. No noticeable variation of lattice parameters with increasing magnesium content was observed, while X-ray densities were found to decrease. This can be explained on the basis of ionic radii and atomic masses of the substituted cation. Transmission electron microscope (TEM) shows that, particles are permanently magnetized and get agglomerated. The saturation magnetization (Ms) and coercivity (Hc) as a function of Mg content were investigated using vibrating sample magnetometer (VSM). It has been found that the Ms increases firstly up to x=0.2 and then decreases, while Hc continuously decreases. Magnetic susceptibility measurements give results which agree well with those obtained by VSM. The obvious decrease in the Curie temperature (TC) with increasing Mg indicates that the ferrimagnetic grains are widely separated and enclosed by non-magnetic magnesium ions. 
ISSN : 0304-8853 
Journal Name : Journal of Magnetism and Magnetic Materials 
Volume : 321 
Issue Number : 19 
Publishing Year : 2009 AH
2009 AD 
Article Type : Article 
Added Date : Monday, February 1, 2010 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
محمد عبدالفتاح جبلGabal, Mohamed AResearcherDoctoratemgabalabdonada@yahoo.com

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