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Received October 5, 2013
Accepted December 18, 2013
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Synthesis and characterization of Co and Mn doped NiO nanoparticles
Kaliyan Vallalperuman†
Mathivanan Parthibavarman
Sekar Sathishkumar
Manickam Durairaj
Kuppusamy Thavamani1
Department of Physics, Mahendra Engineering College, Tiruchengode 637503, India 1Department of Physics, AVS Technical Campus, Salem 636106, India
Korean Journal of Chemical Engineering, April 2014, 31(4), 639-643(5), 10.1007/s11814-013-0286-2
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Abstract
Diluted magnetic semiconductors (DMS) are intensively studied for their potential spintronics applications, especially those with Curie temperature above the room temperature. Ni1-xMnxO and Ni1-xCoxO (x=1% & 2%), nanoparticles with size around 40-50 nm, were prepared by co-precipitation method. An NiO single phase structure was confirmed by powder X-ray diffraction measurements. Also, diffraction peaks show a systematic shift towards higher angle with an increase in Mn concentration, which is associated with the lattice variation. The samples were_x000D_
pelleted and examined for its magnetic property using a vibrating sample magnetometer (VSM); it indicates paramagnetic-like behavior at room temperature. The increase in a.c conductivity with increasing temperature is attributed to the increase in drift mobility of the charge carriers.
Keywords
References
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