کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1612269 | 1516306 | 2014 | 9 صفحه PDF | دانلود رایگان |
• Zinc doped cobalt ferrite nanopowder has been prepared at low temperature.
• Characterization by PXRD, SEM, FTIR techniques confirms the nanoregime.
• Magnetic and dielectric properties with Zn2+ mol% content were reported.
• 50 mol% of Zn2+ dopant in cobalt ferrite may be suitable material for nanodevices.
Zinc substituted cobalt ferrite powders {Co(1−x)ZnxFe2O4} (0.0 ⩽ x ⩽ 0.5) were prepared by the solution combustion method. The structural, morphological, magnetic and electrical properties of as synthesized samples were studied. Powder X-ray diffraction patterns reveals single phase, cubic spinel structure with space group No. Fd 3¯m (2 2 7). As zinc concentration increases, the lattice constant increases and the crystallite size decreases. The minimum crystallite size of ∼12 nm was observed for x = 0.5 composition. The synthesized ferrite compounds show ferrimagnetic behavior, with coercivity value of 10779 Oe (Hard ferrite) at 20 K and 1298 Oe (soft ferrite) at room temperature (RT). The maximum saturation magnetization recorded for the Co0.5Zn0.5Fe2O4 composition was 99.78 emu g−1 and 63.83 emu g−1 at 20 K and RT respectively. The dielectric parameters such as dielectric constant, loss tangent and AC conductivity were determined as a function of frequency at RT. The magnetic and dielectric properties of the samples illustrates that the materials were quite useful for the fabrication of nanoelectronic devices.
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Journal: Journal of Alloys and Compounds - Volume 587, 25 February 2014, Pages 50–58