Samenvatting
Mössbauer spectra of a carbon-supported iron catalyst, consisting of 3.5 wt % Fe on the carbon black Carbolac-1, show that all metallic iron is superparamagnetic both at 300 and at 80 K. Spectra measured in applied magnetic fields up to 1 T confirm that the signal is due to α-Fe. Analysis of the magnetic field dependence of the spectra shows that the average diameter of the particles is 2.5 ± 0.2 nm. The sample is particularly suited for fundamental investigations of superparamagnetic relaxation and surface magnetism in metallic iron particles.
Originele taal-2 | Engels |
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Pagina's (van-tot) | 4898-4900 |
Aantal pagina's | 3 |
Tijdschrift | Journal of Physical Chemistry |
Volume | 89 |
Nummer van het tijdschrift | 23 |
DOI's | |
Status | Gepubliceerd - 1 dec. 1985 |