Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2011-01-28
Journal of Nanoscience and Nanotechnology Vol. 10, 7204-7207, 2010
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
8 pages 4 figures
Scientific paper
10.1166/jnn.2010.2751
We report room temperature ferromagnetism in Ni doped CeO2 nanoparticles using X-ray diffraction (XRD), high resolution transmission electron microscopy (HR-TEM), and dc magnetization measurements. Nanoparticles of Ce1-xNixO2 (0.0 \leq x \leq 0.10) were prepared by using a co-precipitation method. XRD measurements indicate that all samples exhibit single phase nature with cubic structure and ruled out the presence of any secondary phase. Lattice parameters, strain and particle size calculated from XRD data have been found to decrease with increase in Ni doping. Inter-planner distance measured from HR-TEM images for different Ni doped samples indicate that Ni ions are substituting Ce ions in CeO2 matrix. Magnetization measurements performed at room temperature display weak ferromagnetic behavior of Ce1-xNixO2 (0.0 \leq x \leq 0.10) nanoparticles. Magnetic moment calculated from magnetic hysteresis loop was found to increases with Ni doping up to 7% and then start decreasing with further doping.
Kim Joo. Young.
Koo B. H.
Kumar Shalendra
Lee Chong Gyu
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