کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1805281 1024676 2006 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation of nanocrystalline MnFe2O4 by doping with Ti4+ ions using solid-state reaction route
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Preparation of nanocrystalline MnFe2O4 by doping with Ti4+ ions using solid-state reaction route
چکیده انگلیسی

Nanostructured manganese ferrites (MnFe2O4) with diameters in the range of 45–30 nm were synthesized by Ti4+ ion doping, using conventional solid-state reaction route. The substitution of Ti4+ ions created vacancies at Mn2+ sites and the coupling of ferrimagnetically active oxygen polyhedra was broken. This created nanoscale regions of ferrites. A reduction of magnetization for decreasing particle size was observed. Coercivity showed an increasing trend. This was explained as arising due to multidomain/monodomain magnetic behaviour of magnetic nanoparticles. DC resistivities of the doped specimens indicated the presence of an interfacial amorphous phase formed by the nanoparticles. Zero-field cooled and field-cooled curves from 30 nm sized particles showed a peak at TB (∼125 K), typical of superparamagnetic blocking temperature.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 307, Issue 2, December 2006, Pages 222–226
نویسندگان
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