Synthesis and characterization of Co and Mn doped NiO nanoparticles
Autor: | S. Sathishkumar, Kuppusamy Thavamani, K. Vallalperuman, M. Parthibavarman, Manickam Durairaj |
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Rok vydání: | 2014 |
Předmět: | |
Zdroj: | Korean Journal of Chemical Engineering. 31:639-643 |
ISSN: | 1975-7220 0256-1115 |
Popis: | Diluted magnetic semiconductors (DMS) are intensively studied for their potential spintronics applications, especially those with Curie temperature above the room temperature. Ni1−x Mn x O and Ni1−x Co x O (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 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. |
Databáze: | OpenAIRE |
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