[en] Based on experimental magnetic-field-dependent neutron scattering data, we have calculated the autocorrelation function of the spin misalignment of nanocrystalline 160gadolinium. The analysis suggests the existence of two characteristic length scales in the spin system: the smaller one is about 5 nm and is attributed to the defect cores of the grain boundaries, whereas the larger length scale is of the order of the average crystallite size D = 21 nm and presumably describes the response of the magnetization to the magnetic anisotropy field of the individual crystallites.
Disciplines :
Physique
Identifiants :
UNILU:UL-ARTICLE-2010-468
Auteur, co-auteur :
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, Saarbrücken, Germany
Ferdinand, A.; Technische Physik, Universität des Saarlandes, Saarbrücken, Germany
Markmann, J.; Technische Physik, Universität des Saarlandes, Saarbrücken, Germany
Sharp, M.; GKSS Forschungszentrum, Geesthacht, Germany
