کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1800583 | 1024539 | 2012 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Magnetodielectric effect in composites of nanodimensional glass and CuO nanoparticles Magnetodielectric effect in composites of nanodimensional glass and CuO nanoparticles](/preview/png/1800583.png)
Nanocomposites comprising CuO particles of average diameter 21 nm coated with 5 nm silica glass containing iron ions were synthesized by a chemical route. An ion exchange reaction at the nanoglass/CuO interface produced iron-doped CuO with copper ion vacancies within the nanoparticles. Room temperature ferromagnetic-like behavior was observed in the nanocomposites. This was ascribed to uncompensated spins contributed by Fe ions with associated copper ion vacancies. A rather high value of magnetodielectric parameter in the range 16–26% depending on the measuring frequency was exhibited by these nanocomposites at a magnetic field of 10 KOe. This was caused by a magnetoresistance of 33% in the iron doped CuO nanoparticles. The experimental results were fitted to the Maxwell–Wagner Capacitor model developed by Catalan. These materials will be suited for magnetic sensor applications.
► Synthesis of nanocomposites comprising CuO nanoparticles and interfacial nanodimensional silica glass.
► These exhibited ferromagnetic-like behavior at room temperature.
► High value of magnetodielectric parameter was obtained in the range 16–26% depending on the measuring frequency.
► The Maxwell–Wagner Capacitor model of Catalan was used satisfactorily to explain the results.
Journal: Journal of Magnetism and Magnetic Materials - Volume 324, Issue 23, November 2012, Pages 4073–4077