Motaung, DEKortidis, IPapadaki, DNkosi, SSMhlongo, Gugu HWesley-Smith, JMalgas, GFMwakikunga, Bonex WCoetsee, ESwart, HCKiriakidis, GRay, SS2014-09-222014-09-222014-08Motaung, D.E, Kortidis, I, Papadaki, D, Nkosi, S.S, Mhlongo, G.H, Wesley-Smith, J, Malgas, G.F, Mwakikunga, B.W, Coetsee, E, Swart, H.C, Kiriakidis, G and Ray, S.S. 2014. Defect-induced magnetism in undoped and Mn-doped wide band gapzinc oxide grown by aerosol spray pyrolysis. Applied Surface Science,vol. 311, pp 14-260169-4332http://ac.els-cdn.com/S0169433214009593/1-s2.0-S0169433214009593-main.pdf?_tid=8a3d0200-3e6c-11e4-8888-00000aab0f02&acdnat=1410959842_c09063720e4b430147225da638e53730http://hdl.handle.net/10204/7679https://www.sciencedirect.com/science/article/pii/S0169433214009593https://doi.org/10.1016/j.apsusc.2014.04.183Copyright: 2014 Elsevier. This is an ABSTRACT ONLY. The definitive version is published in Applied Surface Science,vol. 311, pp 14-26We present a systemic study on the structural, optical and magnetic properties of the un-doped and Mn doped ZnO thin films grown by aerosol spray pyrolysis at different deposition times. XRD profilinghas shown that the structures of the prepared products are wurtzite without any evidence of second phases. Surface morphology analysis revealed that incorporation of Mn in the ZnO matrix results inthe formation of “doughnut-like” structures while the corresponding un-doped ZnO showed permeable structures only at long deposition time. Optical results demonstrated that Mn-doped ZnO nanostructures exhibited both the characteristic orange Mn(sup2+)ion-related emission at 595 nm and a shoulder around 667 nm, denoting that the Mn ions have successfully occupied lattice positions of Zn ions. The chemical composition and charge states of the Mn ions in the doped ZnO nanostructures analysed by the EDX andXPS, also confirmed that Mn(sup2+)ions were successfully incorporated onto zinc sites in the ZnO host crystal. With the combination of defect analysis based on PL and XPS, the effect of defects on the nature andorigin of ferromagnetism through EPR was investigated. These findings suggested that zinc and oxygen defects, especially zinc interstitials and singly ionized oxygen vacancies, play a crucial role in mediating ferromagnetism in the undoped ZnO.enMn-doped ZnOFerromagnetismDilute magnetic semiconductorsArticleMotaung, D., Kortidis, I., Papadaki, D., Nkosi, S., Mhlongo, G. H., Wesley-Smith, J., ... Ray, S. (2014). Defect-induced magnetism in undoped and Mn-doped wide band gapzinc oxide grown by aerosol spray pyrolysis. http://hdl.handle.net/10204/7679Motaung, DE, I Kortidis, D Papadaki, SS Nkosi, Gugu H Mhlongo, J Wesley-Smith, GF Malgas, et al "Defect-induced magnetism in undoped and Mn-doped wide band gapzinc oxide grown by aerosol spray pyrolysis." (2014) http://hdl.handle.net/10204/7679Motaung D, Kortidis I, Papadaki D, Nkosi S, Mhlongo GH, Wesley-Smith J, et al. Defect-induced magnetism in undoped and Mn-doped wide band gapzinc oxide grown by aerosol spray pyrolysis. 2014; http://hdl.handle.net/10204/7679.TY - Article AU - Motaung, DE AU - Kortidis, I AU - Papadaki, D AU - Nkosi, SS AU - Mhlongo, Gugu H AU - Wesley-Smith, J AU - Malgas, GF AU - Mwakikunga, Bonex W AU - Coetsee, E AU - Swart, HC AU - Kiriakidis, G AU - Ray, SS AB - We present a systemic study on the structural, optical and magnetic properties of the un-doped and Mn doped ZnO thin films grown by aerosol spray pyrolysis at different deposition times. XRD profilinghas shown that the structures of the prepared products are wurtzite without any evidence of second phases. Surface morphology analysis revealed that incorporation of Mn in the ZnO matrix results inthe formation of “doughnut-like” structures while the corresponding un-doped ZnO showed permeable structures only at long deposition time. Optical results demonstrated that Mn-doped ZnO nanostructures exhibited both the characteristic orange Mn(sup2+)ion-related emission at 595 nm and a shoulder around 667 nm, denoting that the Mn ions have successfully occupied lattice positions of Zn ions. The chemical composition and charge states of the Mn ions in the doped ZnO nanostructures analysed by the EDX andXPS, also confirmed that Mn(sup2+)ions were successfully incorporated onto zinc sites in the ZnO host crystal. With the combination of defect analysis based on PL and XPS, the effect of defects on the nature andorigin of ferromagnetism through EPR was investigated. These findings suggested that zinc and oxygen defects, especially zinc interstitials and singly ionized oxygen vacancies, play a crucial role in mediating ferromagnetism in the undoped ZnO. DA - 2014-08 DB - ResearchSpace DP - CSIR KW - Mn-doped ZnO KW - Ferromagnetism KW - Dilute magnetic semiconductors LK - https://researchspace.csir.co.za PY - 2014 SM - 0169-4332 T1 - Defect-induced magnetism in undoped and Mn-doped wide band gapzinc oxide grown by aerosol spray pyrolysis TI - Defect-induced magnetism in undoped and Mn-doped wide band gapzinc oxide grown by aerosol spray pyrolysis UR - http://hdl.handle.net/10204/7679 ER -