1. Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D, Box 2414, 3001 Heverlee, Belgium, http://fys.kuleuven.be/vsm/fun/Research
2. Department of Metallurgy and Materials Engineering, KU Leuven, Kasteelpark Arenberg 44, 3001 Leuven, Belgium