Surfactant-assisted synthesis of Cd1-xCoxS nanocluster alloys and their structural, optical and magnetic properties

R. Sathyamoorthy, P. Sudhagar, A. Balerna, C. Balasubramanian, S. Bellucci, A. I. Popov, K. Asokan

Research output: Contribution to journalArticlepeer-review

51 Citations (Scopus)

Abstract

We report the synthesis of Co-doped CdS nanoclusters (Cd1-xCoxS) for different doping concentrations (x = 0.10, 0.20 and 0.30) and characterization of their structural, optical, and magnetic properties. The structural properties studied by X-ray diffraction revealed hexagonal-greenockite structure and a decrease of the lattice parameters (a and c) with doping, showing incorporation of Co in the lattice. The morphology of the nanoclusters was studied by scanning electron microscopy. The optical absorption studies, using diffused reflectance spectroscopy, revealed that Co doping modifies the absorption band edge. Ferromagnetic phase was observed in the magnetization measurements at room-temperature due to high carrier concentration. X-ray absorption near edge fine structure measurements at the sulfur (S) K-edge of the Co-doped samples revealed that the valence remains divalent and that there are some changes with Co doping in the spectral intensity.

Original languageEnglish
Pages (from-to)240-245
Number of pages6
JournalJournal of Alloys and Compounds
Volume493
Issue number1-2
DOIs
Publication statusPublished - 18 Mar 2010

Keywords

  • CdS
  • Diluted magnetic semiconductors
  • Electronic structure
  • Nanoclusters

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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