کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1803632 | 1024622 | 2009 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Room temperature ferromagnetism in nanocrystalline Ni-doped ZnO synthesized by co-precipitation Room temperature ferromagnetism in nanocrystalline Ni-doped ZnO synthesized by co-precipitation](/preview/png/1803632.png)
Ni-doped ZnO powder was synthesized by thermal co-decomposition of a mixture of bis(acetylacetonato) zinc(II)hydrate and bis(dimethylglyoximato)nickel(II) complexes. The samples were characterised by X-ray diffraction (XRD), Energy dispersion X-ray fluorescence (EDXRF), and FT-IR spectroscopy. The atomic ratio Ni/Zn of the samples was determined by the EDXRF method to be 1%, 4.3%, 7.4% and 22.5 wt%. The XRD studies show the formation of nanocrystalline (14–18 nm) of Ni-doped ZnO along with nanoparticles of NiO. By magnetic measurements, it was observed that powder contains 1%Ni, 4.3%Ni, 7.4%Ni exhibits superparamagnetic behaviour while the sample of 22.5%Ni prepared in closed atmospheric environment shows clear ferromagnetic (FM) loop at room temperature due to the formation of solid solution Zn1−xNixO.
Journal: Journal of Magnetism and Magnetic Materials - Volume 321, Issue 14, July 2009, Pages 2279–2283