Chin. Phys. Lett.  2011, Vol. 28 Issue (11): 116103    DOI: 10.1088/0256-307X/28/11/116103
CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
Structural and Magnetic Studies of Zn0.95Co0.05O and Zn0.90Co0.05Al0.05O
Murtaza Saleem1**, Saadat A. Siddiqi1,2, Shahid Atiq1, M. Sabieh Anwar3
1Centre of Excellence in Solid State Physics, University of the Punjab, Quaid-e-Azam Campus, Lahore-54590, Pakistan
2Interdisciplinary Research Centre in Biomedical Materials (IRCBM), COMSATS Institute of Information Technology, Defence Road, Off Raiwind Road, Lahore, Pakistan
3 School of Science and Engineering (SSE), Lahore University of Management Sciences (LUMS), Opposite Sector U, D.H.A. Lahore-54792, Pakistan
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Murtaza Saleem, Saadat A. Siddiqi, Shahid Atiq et al  2011 Chin. Phys. Lett. 28 116103
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Abstract Single-phase Zn0.95Co0.05O and Zn0.90Co0.05Al0.05O samples were prepared by a novel combustion method. X-ray diffraction studies exhibit the pure phase wurtzite structure of doped ZnO. Energy dispersive x-ray analysis confirms the incorporation of dopants into the host material. Scanning electron microscopy shows the ordered morphology in both of the samples. Temperature-dependent resistivity analysis describes the expected semiconducting behavior that is similar to the parent ZnO materials. Room-temperature magnetic measurements reveal the absence of ferromagnetism in Co-doped ZnO, while the Co and Al co-doped sample displays apparent room-temperature ferromagnetic behavior. The decrease of resistivity and presence of ferromagnetic behavior in Al-doped ZnCoO system corroborate the significant role of free carriers.
Keywords: 61.46.Hk      75.50.Pp      47.70.Pq      75.75.-c     
Received: 08 July 2011      Published: 30 October 2011
PACS:  61.46.Hk (Nanocrystals)  
  75.50.Pp (Magnetic semiconductors)  
  47.70.Pq (Flames; combustion)  
  75.75.-c (Magnetic properties of nanostructures)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/28/11/116103       OR      https://cpl.iphy.ac.cn/Y2011/V28/I11/116103
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Murtaza Saleem
Saadat A. Siddiqi
Shahid Atiq
M. Sabieh Anwar
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