1. Jülich Centre for Neutron Science JCNS and Peter Grünberg Institut PGI, JARA-FIT, Forschungszentrum Jülich, 52425 Jülich, Germany
2. Department of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, 10691 Stockholm, Sweden
3. Faculty of Science, University of Liège, B-4000 Liège, Belgium
4. Japan Synchrotron Radiation Research Institute (JASRI), Spring-8, Sayo Hyogo 679-5198, Japan