Berlin 2008 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

MA: Fachverband Magnetismus

MA 7: Micro and Nanostructured Magnetic Materials II

MA 7.11: Vortrag

Montag, 25. Februar 2008, 17:45–18:00, EB 301

Spin structure of nanocrystalline Gadolinium studied by magnetic small-angle neutron scattering — •Frank Döbrich¹, Mihdi Elmas¹, Adrian Ferdinand¹, Jürgen Markmann¹, Melissa Sharp², Helmut Eckerlebe², Rainer Birringer¹, and Andreas Michels¹ — ¹Technische Physik, Universität des Saarlandes, Saarbrücken, Germany — ²GKSS Forschungszentrum, Geesthacht, Germany

We report on magnetic-field-dependent 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-leaf” anisotropy in the SANS signal, the origin of which is attributed to the existence of longitudinal magnetization fluctuations associated with a disordered grain-boundary component.