[en] 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–shaped" 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.
Disciplines :
Physique
Identifiants :
UNILU:UL-ARTICLE-2010-501
Auteur, co-auteur :
MICHELS, Andreas ; Technische Physik, Universität des Saarlandes, Germany
Döbrich, Frank ; University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Elmas, M.; Technische Physik, Universität des Saarlandes, Germany
Ferdinand, A.; Technische Physik, Universität des Saarlandes, Germany
Markmann, J.; Technische Physik, Universität des Saarlandes, Germany
Sharp, M.; GKSS Forschungszentrum, Germany
Eckerlebe, H.; GKSS Forschungszentrum, Germany
Kohlbrecher, J.; Paul Scherrer Institute, Switzerland
Birringer, R.; Technische Physik, Universität des Saarlandes, Germany
