Size and grain morphology dependent magnetic behaviour of Co-doped ZnO

作者：Vagadia Megha; Ravalia Ashish; Khachar Uma; Solanki P S; Doshi R R; Rayaprol S; Kuberkar D G^*

来源：Materials Research Bulletin, 2011, 46(11): 1933-1937.

DOI：10.1016/j.materresbull.2011.07.024

• Oxides
• Chemical synthesis
• X-ray diffraction
• Magnetic properties

We have carried out a comparative study of structural, microstructural and magnetic properties of the two sets of Co-doped ZnO samples synthesized using solid state reaction and sol-gel method. Rietveld refinement of the X-ray diffraction data reveals single phase hexagonal wurtzite structure for all the samples, while the tunnelling electron microscopy measurements show the presence of nano-phase in the sol-gel grown Co-doped ZnO samples. It is found that, the microstructure strongly depends on the synthesis method adopted. Samples with higher Co-concentration synthesized by SSR route exhibit antiferromagnetism while SG grown Co-doped ZnO samples exhibit weak ferromagnetic behaviour. Improved magnetic phase in the SG grown samples has been attributed to the grain morphology.

• 出版日期2011-11