Structural, Magnetic and Electronic Properties of Surface Oxidised Fe Nanoparticles |
| Journal |
Solid State Phenomena (Volume 140) |
| Volume |
Perspectives of nanoscience and nanotechnology |
| Edited by |
Witold Łojkowski and John R. Blizzard |
| Pages |
47-54 |
| DOI |
10.4028/www.scientific.net/SSP.140.47 |
| Online since |
October, 2008 |
| Authors |
Janusz Przewoźnik,
T. Tyliszczak,
D. Rybicki,
J. Żukrowski,
W. Szczerba,
M. Sikora,
Cz. Kapusta,
H. Stepankova,
R.F. Pacheco,
D. Serrate,
M.R. Ibarra
|
| Keywords |
Ball Milling, Electronic Properties, Magnetic Property, Structural Properties, Surface Oxidised Fe Powders |
| 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%. |
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