Korean Journal of Chemical Engineering

, Volume 31, Issue 4, pp 639–643 | Cite as

Synthesis and characterization of Co and Mn doped NiO nanoparticles

  • Kaliyan Vallalperuman
  • Mathivanan Parthibavarman
  • Sekar Sathishkumar
  • Manickam Durairaj
  • Kuppusamy Thavamani
Environmental Engineering
First Online:
Received:
Accepted:

Abstract

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.

Keywords

Diluted Magnetic Semiconductors Nanocrystalline Crystal Structure Vibrating Sample Magnetometer 
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Copyright information

© Korean Institute of Chemical Engineers, Seoul, Korea 2013

Authors and Affiliations

  • Kaliyan Vallalperuman
    • 1
  • Mathivanan Parthibavarman
    • 1
  • Sekar Sathishkumar
    • 1
  • Manickam Durairaj
    • 1
  • Kuppusamy Thavamani
    • 2
  1. 1.Department of PhysicsMahendra Engineering CollegeTiruchengodeIndia
  2. 2.Department of PhysicsAVS Technical CampusSalemIndia

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