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نوع الوثيقة : مقال في مجلة دورية 
عنوان الوثيقة :
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
 
الموضوع : كيمياء 
لغة الوثيقة : الانجليزية 
المستخلص : 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. 
ردمد : 0304-8853 
اسم الدورية : Journal of Magnetism and Magnetic Materials 
المجلد : 321 
العدد : 19 
سنة النشر : 2009 هـ
2009 م 
نوع المقالة : مقالة علمية 
تاريخ الاضافة على الموقع : Monday, February 1, 2010 

الباحثون

اسم الباحث (عربي)اسم الباحث (انجليزي)نوع الباحثالمرتبة العلميةالبريد الالكتروني
محمد عبدالفتاح جبلGabal, Mohamed Aباحثدكتوراهmgabalabdonada@yahoo.com

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