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Diluted magnetic semiconductors; ferromagnetic, SnO₂; ab-initio calculation; KKR–CPA; spintronic.

Structural and magnetic properties of Sn_0.95Co_0.05O₂ nanocrystalline and diluted magnetic semiconductors have been investigated. This sample has been synthesized by co-precipitation route. Study of magnetization hysteresis loop measurements infer that the sample of Sn_0.95Co_0.05O₂ nanoparticle shows a well-defined hysteresis loop at 300 K temperature, which reflects its ferromagnetic behaviour. We confirmed the room-temperature intrinsic ferromagnetic (FM) semiconductors by ab initio calculation, using the theory of the functional of density (DFT) by employing the method of Korringa–Kohn–Rostoker (KKR) as well as coherent potential approximation (CPA, explain the disorder effect) to systems. The ferromagnetic state energy was calculated and compared with the local-moment-disordered (LMD) state energy for local density approximation (LDA) and LDA–SIC approximation. Mechanism of hybridization and interaction between magnetic ions in Sn_0.95Co_0.05O₂ is also investigated. To explain the origin of ferromagnetic behaviour, we give information about total and atoms projected density of state functions.

O Mounkachi¹ E Salmani² M Boujnah² H Labrim³ H El Moussaoui^{1 2} M Hamedoun¹ A Benyoussef^{1 2} A El Kenz² H Ez-Zahraouy² R Masrour⁴ E K Hlil⁵

1. The Institute for Nanomaterials and Nanotechnology, MAScIR (Moroccan Foundation for Advanced Science, Innovation and Research), Rabat, Morocco
2. LMPHE (URAC 12), Departement of Physique, BP 1014, Faculty of Science, Mohammed V-Agdal University, Rabat, Morocco
3. National Centre for Energy, Sciences and Nuclear Techniques, CNESTEN, Morocco
4. Laboratory of Materials, Processes, Environment and Quality, Cady Ayyed University, National School of Applied Sciences, Safi, Morocco
5. Institut Néel, CNRS et Université Joseph Fourier, BP 166, F-38042 Grenoble Cedex 9, France

Published

May 2014

Manuscript received

17 October 2012

Manuscript revised

17 December 2012