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https://hdl.handle.net/1822/38858
Título: | Structural, optical and magnetic properties of pulsed laser deposited Co-doped ZnO films |
Autor(es): | Karzazi, O. Sekhar, K. C. El Amiri, A. Hlil, E. K. Conde, O. Levichev, S. Moreira, J. A. Chahboun, Adil Almeida, A. Gomes, M. J. M. |
Data: | 2015 |
Editora: | Elsevier 1 |
Revista: | Journal of Magnetism and Magnetic Materials |
Citação: | Karzazi, O., Sekhar, K. C., El Amiri, A., Hlil, E. K., Conde, O., Levichev, S., . . . Gomes, M. J. M. (2015). Structural, optical and magnetic properties of pulsed laser deposited Co-doped ZnO films. Journal of Magnetism and Magnetic Materials, 395, 28-33. doi: 10.1016/j.jmmm.2015.07.030 |
Resumo(s): | Zn1−xCoxO films with different Co concentrations (with x=0.00, 0.10, 0.15, and 0.30) were grown by pulsed laser deposition (PLD) technique. The structural and optical properties of the films were investigated by grazing incidence X-ray diffraction (GIXRD), Raman spectroscopy and photoluminescence (PL). The magnetic properties were measured by conventional magnetometry using a SQUID and simulated by ab-initio calculations using Korring–Khon–Rostoker (KKR) method combined with coherent potential approximation (CPA). The effect of Co-doping on the GIXRD and Raman peaks positions, shape and intensity is discussed. PL studies demonstrate that Co-doping induces a decrease of the bandgap energy and quenching of the UV emission. They also suggest the presence of Zn interstitials when x≥0.15. The 10% Co-doped ZnO film shows ferromagnetism at 390 K with a spontaneous magnetic moment ≈4×10−5 emu and coercive field ≈0.17 kOe. The origin of ferromagnetism is explained based on the calculations using KKR method. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/38858 |
DOI: | 10.1016/j.jmmm.2015.07.030 |
ISSN: | 0304-8853 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | CDF - FMNC - Artigos/Papers (with refereeing) |
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article.pdf Acesso restrito! | 2,69 MB | Adobe PDF | Ver/Abrir |