| Issue |
EPL
Volume 85, Number 4, February 2009
|
|
|---|---|---|
| Article Number | 47003 | |
| Number of page(s) | 6 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/85/47003 | |
| Published online | 18 February 2009 | |
Porosity-induced spin disorder in nanocrystalline inert-gas–condensed iron
1
Technische Physik, Universität des Saarlandes - Saarbrücken, Germany, EU
2
GKSS Forschungszentrum - Geesthacht, Germany, EU
3
Paul Scherrer Institute - CH-5232 Villigen PSI, Switzerland
Corresponding author: andreas.michels@mx.uni-saarland.de
Received:
17
November
2008
Accepted:
27
January
2009
We report magnetization and magnetic neutron scattering measurements on nanocrystalline Fe which was prepared by means of the inert-gas condensation technique. Depending on the compaction pressure applied during the synthesis procedure (0.5–1.8 GPa), the resulting Fe samples contain porosity with volume fractions between about 20–35%. We provide evidence that the spin disorder which is associated with porosity has a strong influence on magnetic properties, and it gives rise to a characteristic clover-leaf–shaped angular anisotropy in the elastic-magnetic-scattering cross-section.
PACS: 75.50.Tt – Fine-particle systems; nanocrystalline materials / 75.25.+z – Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source X-ray scattering, etc.) / 61.05.fg – Neutron scattering (including small-angle scattering)
© EPLA, 2009
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