Volume 81, Number 6, March 2008
|Number of page(s)||5|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||25 February 2008|
Spin structure of nanocrystalline gadolinium
Technische Physik, Universität des Saarlandes - Saarbrücken, Germany
2 GKSS Forschungszentrum - Geesthacht, Germany
3 Paul Scherrer Institute - CH-5232 Villigen PSI, Switzerland
Corresponding author: email@example.com
Accepted: 29 January 2008
We report on magnetic-fielddependent small-angle neutron scattering (SANS) experiments on nanocrystalline inert-gas condensed bulk Gd, which was synthesized using the low-capturing isotope 160Gd. The angular dependency of the scattering cross-section is in very good agreement with recent theoretical predictions. Rather unexpected for this type of material, we observe a “clover-leafshaped” anisotropy in the SANS signal, the origin of which is attributed to the existence of longitudinal magnetization fluctuations associated with atomic site disorder and modified coupling inside the defect cores of grain boundaries.
PACS: 61.05.fg – Neutron scattering including small-angle scattering / 75.25.+z – Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source X-ray scattering, etc.) / 75.50.Tt – Fine-particle systems; nanocrystalline materials
© EPLA, 2008
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