Abstract
We report on the effect of Sb co-doping on the structural and magneticproperties of bulk ZnMnO samples. Samples with nominal compositionsZn0.98−yMn0.02SbyO (y = 0, 0.01 and 0.03) were synthesized using a solid state reaction route at800 °C. X-raydiffraction (XRD) results reveal wurtzite structure of pure ZnO without any impurity phases for compositionsy = 0.0 and 0.01. On the other hand, a weak diffraction peak corresponding to the impurity phaseZn/MnSb2O6 was detected in the XRD pattern of compositiony = 0.03. Energy dispersive x-ray (EDAX) results confirm the presenceof all elements in the samples in the stoichiometric ratio. TheM–H curve of the pure ZnMnO sample shows paramagnetic behavior, whereasM–H curves of Sb co-doped samples show room temperature ferromagnetism(RTFM) with saturated loops. Saturation magnetization (MS) and coercivefield (HC) both increase with the increase in Sb doping percentage. Inverse susceptibility(1/χ) versustemperature (T) curves suggests dominant antiferromagnetic interactions in the samples which decreasewith the co-doping of Sb. Based on the experimental results we conclude thatthe observed RTFM in Sb co-doped ZnMnO is due to defects induced by strain.
Published Version
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