کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1525977 1511846 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A facile method to control the size and magnetic properties of CoFe2O4 nanoparticles
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
A facile method to control the size and magnetic properties of CoFe2O4 nanoparticles
چکیده انگلیسی

We discuss a facile approach to control the size and the magnetic properties of CoFe2O4 nanoparticles by varying the solvent dielectric constant. X-ray diffraction (XRD), Transmission Electron Microscopy (TEM), Thermo-Gravimetric Analysis (TGA) and Vibrating Sample Magnetometer (VSM) are used to study the structural, thermal and magnetic properties of CoFe2O4 nanoparticles. XRD analysis confirms the cubic spinel phase of CoFe2O4 nanoparticles. The average particle size increases from 10 ± 1 to 16 ± 1 nm as the dielectric constant of the solvent is increased from 47 to 80. The room temperature magnetization measurement confirms that the saturation magnetization increases with particle size. The linear dependence of the dielectric constant of the medium on particle size is in good agreement with nucleation theory. Our experimental findings unambiguously confirm that the change in supersaturation has a significant influence on the nucleation rate and the particle size.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 115, Issues 2–3, 15 June 2009, Pages 712–717
نویسندگان
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