Volume 85, Number 4, February 2009
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||18 February 2009|
Porosity-induced spin disorder in nanocrystalline inert-gas–condensed iron
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: email@example.com
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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