Paper Title:
Structural, Magnetic and Electronic Properties of Surface Oxidised Fe Nanoparticles
  Abstract

A combined XRD, Mössbauer, SEM, STXM and NMR study of naturally oxidised, ball milled iron powders is presented. The XRD patterns show the peaks of the bcc-Fe phase with the line widths increasing with the milling time. This corresponds to a flattening of the crystallites, as confirmed by SEM, and increased strain due to the accumulation of defects. The effect is consistent with the variation of the Mössbauer line-widths with the milling time. Scanning Transmission Xray Microscopy (STXM) measurements provided oxygen maps of the particles and revealed that the dominant oxide in the nanometric oxide layer is magnetite. The 57Fe spin echo NMR study reveals a dominant signal corresponding to a bcc-Fe core and a much weaker resonance corresponding to a magnetite amount of less than 1%.

  Info
Periodical
Solid State Phenomena (Volume 140)
Edited by
Witold Łojkowski and John R. Blizzard
Pages
47-54
DOI
10.4028/www.scientific.net/SSP.140.47
Citation
J. Przewoźnik, T. Tyliszczak, D. Rybicki, J. Żukrowski, W. Szczerba, M. Sikora, C. Kapusta, H. Stepankova, R.F. Pacheco, D. Serrate, M.R. Ibarra, "Structural, Magnetic and Electronic Properties of Surface Oxidised Fe Nanoparticles", Solid State Phenomena, Vol. 140, pp. 47-54, 2008
Online since
October 2008
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$32.00
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