1. Nanoscale Engineering Division, Department of Physics, Chemistry, and Biology, Linköping University, SE 581 83 Linköping, Sweden
2. Institut Pprime, Département Physique et Mécanique des Matériaux, UPR 3346 CNRS, Université de Poitiers, SP2MI, 11 Bvd. M. et P. Curie, TSA 41123, F86073 Cedex 9 Poitiers, France
3. Thin Film Physics Division, Department of Physics, Chemistry, and Biology, Linköping University, SE-581 83 Linköping, Sweden
4. Department of Physics, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece
5. Department of Materials Science and Engineering, University of Ioannina, Ioannina 45110, Greece
6. School of Science and Technology. Nottingham Trent University, NG11 8NS Nottingham, U.K.
7. Institute of Materials Science and Computing, University Research Center of Ioannina (URCI), 45110 Ioannina, Greece
8. Department of Surface Engineering and Optoelectronics, Jozef Stefan Institute, SI-1000 Ljubljana, Slovenia
9. Materials Science and Physics Departments, University of Illinois, Urbana, Illinois 61801, United States
10. Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan