کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1525048 995346 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Magnetic behavior of cobalt ferrite nanowires prepared by template-assisted technique
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Magnetic behavior of cobalt ferrite nanowires prepared by template-assisted technique
چکیده انگلیسی

Spinel cobalt ferrite nanowires were successfully prepared in mesoporous silica SBA-15 as a host matrix followed by slow thermal decomposition of the precursors inside the silica-based template. The formation and phase control of as-synthesized nanostructured cobalt ferrites were confirmed by X-ray diffraction (XRD) measurements at different annealing temperatures ranging from 500 to 1000 °C. The one-dimensional spinel nanostructures were identified by recording the transmission electron microscopy (TEM) images after a selective removal of the silica template in aqueous solution of NaOH. The final product was also characterized using infrared spectroscopy (FT-IR) and vibration sample magnetometer (VSM). The presence of SBA-15 lowers the formation temperature of cobalt ferrite nanowires compared to the corresponding bulk material. The nanowires annealed up to 700 °C exhibited magnetic behavior characteristic for soft magnetic materials, whereas samples annealed at temperature higher than 700 °C revealed magnetic behavior characteristic for hard magnetic materials with rectangular form and large coercive field.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 123, Issue 1, 1 September 2010, Pages 254–259
نویسندگان
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