1. Electrical
Engineering Institute, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
2. Institute
of Materials Science and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
3. FEI Electron Optics, 5600 KA Eindhoven, The Netherlands
4. Institute
of Physics, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
5. Laboratoire
National
des Champs Magnétiques Intenses CNRS-UGA-UPS-INSA, 143 avenue de Rangueil, 31400 Toulouse, France
6. Department
of Experimental Physics, Faculty of Fundamental Problems of Technology, Wrocław University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wrocław, Poland