1. Jülich Centre for Neutron Science JCNS and Peter Grünberg Institute PGI, JARA-FIT, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany
2. ESRF- The European Synchrotron, CS40220, F-38043 Grenoble Cedex 9, France
3. Faculté des Sciences, Université de Liège, B-4000 Liège, Belgium
4. Deutsches Elektronen-Synchrotron, D-22607 Hamburg, Germany
5. Shubnikov Institute of Crystallography RAS, Leninskii pr-t 59, Moscow 119333, Russia
6. Lomonosov Moscow State University, Faculty of Physics, GSP-1, 1-2 Leninskiye Gory, Moscow 119991, Russia
7. Department of Physics, Faculty of Science, University of Johannesburg, Johannesburg, South Africa
8. Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA