On the preparation, structural and magnetic properties of ZnO:Co nanoparticles

Author： Varadhaseshan Radhakrishnan Meenakshi Sundar Sankarasubramanian Prema Chidambaram

E-ISSN： 1286-0050|66|1|10602-10602

ISSN： 1286-0042

Source： EPJ Applied Physics (The), Vol.66, Iss.1, 2014-04, pp. : 10602-10602

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Abstract

Cobalt doped ZnO nanoparticles were synthesized by microwave irradiation technique for their structural and magnetic properties. Initially the samples were exhibit single phase standard ZnO wurtzite structure (x ≤ 0.1) further Co concentration increase Co₃O₄ phase was confirmed by X-ray diffraction analysis. The average crystallite sizes of cobalt doped ZnO particles were calculated by Debye-Scherrer formula and are nearly 25 nm. The hexagonal wurtzite structure of ZnO and destroyed cubical Co₃O₄ were identified in the TEM images. The presence of metal oxide was confirmed by Fourier transform infrared spectral analysis result. The micro-Raman analysis confirmed the existence of Co₃O₄ phase. Magnetization measurements performed by using vibrating sample magnetometer determine the paramagnetic behavior for the synthesized samples.