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Structural, vibrational, optical and magnetic properties of sol–gel derived Nd doped ZnO nanoparticles

  • Sunil Chauhan
  • Manoj KumarEmail author
  • Sandeep Chhoker
  • S. C. Katyal
  • V. P. S. Awana
Article

Abstract

Nd doped ZnO (Zn1-xNdxO, x = 0.0, 0.03, 0.06 and 0.10) nanoparticles were prepared by sol–gel method. Phase identification and effect of Nd ions substitution in ZnO lattice were confirmed by Rietveld analysis of XRD patterns. UV–Visible absorption spectra of pure and Nd doped ZnO nanoparticles showed the variation of the band gap in the range of 3.31–3.26 eV. The FTIR analysis of pure and Nd doped ZnO nanoparticles exhibited similar patterns in Zn/Nd–O bond length as obtained from the Rietveld refinement. Raman analysis confirmed the formation of a wurtzite structure wherein the local structure of ZnO nanoparticles is distorted due to Nd substitution. Magnetization-magnetic field hysteresis curves for pure and Nd doped ZnO nanoparticles revealed diamagnetic and paramagnetic behaviour, respectively. The paramagnetic behaviour of doped ZnO nanoparticles increased with increasing Nd concentration. However, the weak ferromagnetic behaviour of doped ZnO nanoparticles is observed after subtracting paramagnetic components, whereas the ferromagnetic behavior increased up to x = 0.06 samples, which further declined for x = 0.10 sample due to competition between paramagnetic and ferromagnetic ordering. The reduction in the ferromagnetic behavior for x = 0.10 sample indicates that the solubility limit of Nd atoms in ZnO lattice has been reached and paramagnetically coupled Nd atoms increased due to the increasing secondary phases.

Keywords

Room Temperature Ferromagnetism Longitudinal Optical Transverse Optical Wurtzite Crystal Structure Ethylene Glycol Monomethylether 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

The authors are thankful to Advance Instrumentation Research Facility (AIRF) JNU for TEM and FTIR measurements and DST National facility for magnetic measurements at IIT Delhi. The authors are also thankful to INUP program (IISc Bangalore) for Raman measurements. Sunil Chauhan is thankful to JIIT for providing the teaching assistance.

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • Sunil Chauhan
    • 1
  • Manoj Kumar
    • 1
    Email author
  • Sandeep Chhoker
    • 1
  • S. C. Katyal
    • 1
  • V. P. S. Awana
    • 2
  1. 1.Department of Physics and Material Science and EngineeringJaypee Institute of Information TechnologyNoidaIndia
  2. 2.Quantum Phenomenon and Applications LaboratoryNational Physical LaboratoryNew DelhiIndia

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