Size distribution of FeNiB nanoparticles

  • Lackner P
  • Pajic D
  • Reissner M
  • et al.
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Two samples of amorphous nanoparticles FeNiB, one of them with SiO 2 sheath around the core and one without, were investigated by transmission electron microscopy and magnetic measurements. The coating gives mean particle diameters of 4.3 nm compared to 7.2 nm for the uncoated particles. Magnetic measurements prove superparamagnetic behaviour above 160 K (350 K) for the coated (uncoated) sample. With use of effective anisotropy constant K eff - determined from hysteresis loops - size distributions are determined both from ZFC curves, as well as from relaxation measurements. Both are in good agreement and are very similar for both samples. Comparison with the size distribution determined from TEM pictures shows that magnetic clusters consist of only few physical particles. ? Owned by the authors, published by EDP Sciences, 2014.




Lackner, P., Pajic, D., Reissner, M., Novosel, N., Zadro, K., Stöger-Pollach, M., & Babic, E. (2014). Size distribution of FeNiB nanoparticles. EPJ Web of Conferences, 75, 05008.

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