1. II. Physikalisches Institut, Universität zu Köln, Zülpicher Straße 77, 50937 Köln, Germany
2. Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich, Wilhelm-Johnen Straße, 52428 Jülich, Germany
3. Division of Synchrotron Radiation Research, Department of Physics, Lund University, P.O. Box 118, SE-221 00 Lund, Sweden
4. MAX IV Laboratory, Lund University, P.O. Box 118, SE-221 00 Lund, Sweden
5. NanoLund, Department of Physics, Lund University, P.O. Box 118, SE-221 00 Lund, Sweden