Influence on Doping of 0.4 mol of Co in ZnO Aiming their Application in DMS

Abstract:

This paper proposes evaluate the effect on doping of 0.4mol of Co in ZnO, Aiming to use in diluted magnetic semiconductor (DMSs), so for this purpose, an evaluation of the characteristics: structural, morphological and magnetic was investigated. The samples were synthesized by combustion reaction using urea as fuel and an electric heater as source of heating. During the synthesis was performed measurements of temperature and time of combustion flame. The samples were characterized by X-ray diffraction (DRX), adsorption of nitrogen (BET), scanning electron microscopy (SEM), particle size distribution and magnetic measurement. The maximum temperature, and reaction time were, 520 oC and 240 s. The data of the XRD showed how phase majority the ZnO, with crystallite size of 27 nm and trace of second phase CoCo₂O₄. Presented superficial area of 33.5 m²/g, with morphology consisting of agglomerates in the form of balls smaller than 5 μm. The sample presented behavior ferrimagnetic with saturation magnetization of 0.32 emu/g, type of a magnetic semiconductor.

• Periodical: Materials Science Forum (Volume 820)
• Pages: 181-186
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.820.181
• Online since: June 2015
• Authors: Lucius Vinicius Rocha Machado, L.F. Mouzinho, M.R. Silva, E.M.J.A. Pallone, A.C.F.M. Costa
• Keywords: Diluted Magnetic Semiconductors, Spintronic, Zinc Oxide

References

[1] T. Dietl, H. Ohno, F. Matsukura: Physical Review B Vol. 63 (2000), p.195.

[2] X. Xingyan, C. Chuanbao, C. Zhuo: Journal of Magnetism and Magnetic Materials Vol. 323 (2011), p.1886.

[3] R.A. Torquato, S.E. Srirsath, R.H.G.A. Kiminami, A.C.F.M. Costa: Ceramics International Vol. 40 (2014), p.6535.

[4] M. M. Hassan, A.S. Ahmed, M. Chaman, W. Khan, A.H. Naqvi, A. Azam: Materials Research Bulletin (2012).

[5] K.C. Barick, M. Aslam, D. Bahadur: Journal of Alloys and Compounds Vol. 587 (2014), p.282.

[6] G. Srinet, P. Varshney, R. Kumar, V. Sajal, P.K. Kulriya, M. Knobel. S.K. Sharma: Ceramic International Vol. 39 (2013), p.6077.

DOI: 10.1016/j.ceramint.2013.01.025

[7] K.T.R. Reddy, V. Supriya, Y. Murata, M. Sugiyama: Surface & Coatings Technology Vol. 231 (2013), p.149.

[8] R. Torquato, S.E. Shirsath, R.H.A. Kiminami, A.C.F.M. Costa: 21st Congress International of Mechanical Engineering (COBEM). Natal 24 a 28 October 2011. Proceeding.. Natal.. 2011. (RN).

[9] S.R. Jain, K.C. Adiga, V.R. Verneck: Condensed and Fame Vol. 40 (1981), p.71.

[10] J.S. Reed: Principles of Ceramics Processing. (John Wiley & Sons 2 ed. New York, 1994).

[11] N. Bahadur, A.K. Srivastava, S. Kunar, M. Deepa, B. Nag: Thin Solid Films Vol. 518 (2010), p.5257.

[12] X. Xu, C. Cao: Ferromagnetism Vol. 501 (2010), p.265.