1. Institute of Experimental Physics, Saarland University, Campus C 6 3, 66123 Saarbrücken, Germany
2. Groupe de Recherche en Energie Electrique de Nancy (GREEN), Université de Lorraine, 54506 Vandvre-lès-Nancy, France
3. Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo 135-8548, Japan
4. Research Institute for Advanced Electronics and Photonics, National Institute of Advanced Industrial Science (AIST), 1-1-1 Central 2, Umezono, Tsukuba, Ibaraki 305-8568, Japan
5. Department of Physics, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku City, Tokyo 162-8601, Japan
6. Experimentelle Methodik der Werkstoffwissenschaften, Saarland University, Campus D 3 4, 66123 Saarbrücken, Germany
7. Department of Biophysics, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia
8. Laboratory of Physics of Materials - Structures and Properties, Department of Physics, Faculty of Sciences of Bizerte, University of Carthage, 7021 Zarzouna, Tunisia