Size and surface effects on the magnetic properties of NiO nanoparticles.

@article{Proenca2011SizeAS,
  title={Size and surface effects on the magnetic properties of NiO nanoparticles.},
  author={Mariana P Proenca and C{\'e}lia T. Sousa and Andr{\'e} M Pereira and Pedro B. Tavares and Jo{\~a}o Ventura and Manuel Vázquez and Jo{\~a}o P. Ara{\'u}jo},
  journal={Physical chemistry chemical physics : PCCP},
  year={2011},
  volume={13 20},
  pages={
          9561-7
        }
}
NiO nanoparticles (NPs) were prepared by a sol-gel process using the citrate route. The sol-gel parameters were tuned to obtain samples with different average particle sizes, ranging from 12 to 70 nm. Magnetic characterization revealed an increase in the blocking temperature with the diameter of the NPs and an increase in the effective magnetic anisotropy (K(eff)) with decreasing particle size. The magnetic moment per particle was calculated for all samples using the susceptibility value at T… CONTINUE READING

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