Structural Characterization, and Magnetic Morphological Study of Ni⁺² Doped ZnO Synthesized by Combustion Reaction Application for DMS

Abstract:

ZnO is a semiconductor that can be doped with transition metal ions, and thus becomes feasible to use in the diluted magnetic semiconductor (DMS), or semiconductor with magnetic properties. In this work we have studied the influence of doping of Ni⁺² on the structural, morphological and magnetic properties of Zn_1-xNi_xO system, to x = 0.07, 0.1 and 0.2 mol of Ni⁺² synthesized by combustion reaction. The systems were characterized by XRD, SEM and VSM. The maximum temperatures ranged from 639 K and 683 K. All systems showed a majority phase formation of ZnO, with the presence of the second phase NiO. The crystallite size for the majority phase varied between 49 and 56nm. All systems have resulted in samples with a morphology consisting of dense clusters, formed by particles pre-sintered and shaped roughly hexagonal plates. The magnetic measurements showed that the values of saturation magnetization lies between 4.6 to 28.5emu/g, remanent magnetization of 0.01 to 0.3 emu/g, coercive force values varies between 12.7 and 62.4 Oe and Curie temperature ranging from 308 to 311K.

• Periodical: Materials Science Forum (Volumes 727-728)
• Pages: 511-515
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.727-728.511
• Online since: August 2012
• Authors: R. Torquato, E. Shirsath Sagar, Ruth Herta Goldsmith Aliaga Kiminami, Ana Cristina Figueiredo de Melo Costa
• Keywords: Combustion Reaction, DMS, Nickel Oxide (NiO), Zinc Oxide (ZnO)

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